Textile Testing Quality Control Path to the Customer’s Heart Textile Test Products 2002 Our business is driven by standards Textile Test Products 2002 What is standardization? Standardization is the single solution of a recurring problem under the given scientific, technical and economic possibilities. Textile Test Products 2002 How old is standardization? Ancient Egypt, 4000 years ago Standard on bricks made of mud of the river Nile: Length: 41 cm, width: 20 cm. Ancient Rome, 2000 years ago Standard on water pipes of lead: Fixed dimensions, minimum weight and numerical designation of pipes. Textile Test Products 2002 What is a standard? Different definitions by different organizations ISO-Definition: Standards are documented agreements containing technical specifications or other precise criteria to be used consistently as rules, guidelines, or definitions of characteristics, to ensure that materials, products, processes and services are fit for their purpose. Textile Test Products 2002 Technical Standards Standards are developed voluntarily used voluntarily Standards become legally binding when a government references them in a regulation when they are cited in a contract Textile Test Products 2002 Technical Standards Standards contain a main part Annexes or Appendixes The content is mandatory (main part, normative annex) or informal (notes, nonmandatory or informative annex) Textile Test Products 2002 Technical Standards Examples for different types of standards (ASTM): classification guide practice specification terminology test method Textile Test Products 2002 Technical Standards Standards for test methods may describe the required instruments in detail including drawings, pictures, type of instrument, name and address of manufacturer etc. (often in company standards, American standards, “old“ ISO standards) may describe the performance of the test (“new“ ISO standards, CEN standards) Textile Test Products 2002 Technical Standards "Performance based standards "- what does it mean? They focus on the intent of the standard and will no longer specify the type of equipment or manufacturer They allow the user to conduct a test using non-specific instrument parameters (basis: testing procedures) They allow the manufacturer to design and to make improvements to instruments without being "locked in" to a particular design Textile Test Products 2002 Technical Standards Performance based standards advantage: does not retard the technical progress disadvantage: open for competitors disadvantage: may increase variability Textile Test Products 2002 Standardization Organizations Different levels of Standardization International ISO, IEC Regional (European, Arabian countries, Latin America, ...) CEN, CENELEC, ... National ANSI, BSI, DIN, JISC, ... Industry Association AATCC, SAE, VDA, ... Company JC Penney, Marks & Spencer, Sears, Victoria’s Secret... Textile Test Products 2002 Standardization Organizations International ISO - International Standardization Organization founded 1947 headquarter: Geneva, Switzerland 130 members, one in each country 2,800 technical bodies, 30,000 experts 12,000 standards ISO standards may, but do not have to be published by ISO members as national standards. Changes are allowed. IEC - International Electrotechnical Commission founded 1906 headquarter: Geneva, Switzerland formal agreement with ISO, JTC Textile Test Products 2002 Standardization Organizations ISO Members Australia (SAA) Brazil (ABNT) Canada (SCC) Chile (INN) China (CSBTS) Colombia (ICONTEC) Costa Rica (INTECO) Ecuador (INEN) Indonesia (BSN) Israel (SII) Textile Test Products 2002 Japan (JISC) Malaysia (DSM) Mexico (DGN) New Zealand (SNZ) Panama (COPANIT) Philippines (BPS) Singapore (PSB) Thailand (TISI) USA (ANSI) and many more ... Standardization Organizations Europe CEN - European Committee for Standardization founded in the beginning of the sixties headquarter: Brussels, Belgium members: EC + EFTA + Czech Republic CEN standards have to be published by CEN members as national standards without any change. CENELEC - European Committee for Electrotechnical Standardization Textile Test Products 2002 Standardization Organizations CEN Members Austria (ON) Belgium (IBN/BIN) Czech Republic (CSNI) Denmark (DS) Finland (SFS) France (AFNOR) Germany (DIN) Greece (ELOT) Iceland (STRÍ) Ireland (NSAI) Textile Test Products 2002 Italy (UNI) Luxembourg (SEE) Netherlands (NNI) Norway (NSF) Portugal (IPQ) Spain (AENOR) Sweden (SIS) Switzerland (SNV) United Kingdom (BSI) Standardization Organizations Cooperation ISO/CEN Cooperation: Vienna agreement of 1991. The agreement defines procedures for the following: • cooperation by correspondence • cooperation by mutual representation at meetings • adoption of existing International Standards as European Standards • cooperation by transfer of work and parallel approval of standards Principal guideline: General test methods should be developed within ISO. Requests for general test methods within CEN should be transferred to ISO. Textile Test Products 2002 Standardization Organizations Committees ISO Technical Committees CEN Technical Committees TC 35 (Paints) TC 139 (Paints) TC 38 (Textiles) TC 248 (Textiles) TC 61 (Plastics) TC 249 (Plastics) Textile Test Products 2002 Standardization Organizations USA Governmental sector 80 Organizations, 44,000 standards department of defense alone 34,000 standards Private sector 620 Organizations, 49,000 standards central co-ordination: ANSI 130 professional associations and scientific Organizations (for example AATCC, SAE), 14,000 standards 300 trade Organizations, 16,000 standards 40 Standardization Organization (for example ASTM), 17,000 standards Textile Test Products 2002 Standardization Organizations USA ANSI - American National Standards Institute founded 1918 non-profit Organization coordinating Standardization work of 175 accredited Organizations in the private sector no standard development member of ISO and IEC ASTM - American Society for Testing and Materials founded 1898 profit Organization 132 committees, 32,000 members 10,000 standards Textile Test Products 2002 Standardization Organizations USA SAE - Society of Automotive Engineers founded 1905 non-profit Organization 14,000 active members 1,400 automotive standards AATCC - American Association of Textile Chemists and Colorists founded 1921 1,000 active members 185 standard methods, more than 40 % related to ISO standards Textile Test Products 2002 QUESTIONS???? Textile Test Products 2002 Textile Test Products 2002 Colorfastness to Crocking Crocking - A transfer of colorant from the surface of a colored yarn or fabric to another surface or to an adjacent area of the same fabric principally by rubbing Although a physical process, the primary evaluation is for appearance (color) Wet and dry evaluation typically performed Textile Test Products 2002 Crocking Instruments Applicable to many textile materials including dye and printed fabrics, carpeting, and automotive interior materials Manual (for shorter tests) and automatic models available Linear and rotating motion models Can be adapted to provide simple abrasion tests for other materials Textile Test Products 2002 Colorfastness to Crocking AATCC Test Method 8 - Basic Crockmeter Method AATCC Test Method 116 - Rotary Vertical AATCC Test Method 165 - Carpets ISO 105-D02 - Organic Solvents ISO 105-X12 - Colorfastness to rubbing SAE J861 - Organic trim materials ASTM D5053 - Leather Textile Test Products 2002 AATCC Test Method 8 (Basic) Recommended specimen size 5cm by 13cm Wet and dry tests are specified Mount white test cloth with the weave parallel to the direction of rubbing Run test for 10 complete turns Evaluate the white test cloth using the Gray Scale for Staining Textile Test Products 2002 AATCC Test Method 8 (Basic) For the wet test: Establish technique for preparing wet crock cloth squares by weighing a conditioned square, then thoroughly wet out a white testing square in distilled water The wet pick-up should be 65 ± 5% Use of a hand wringer is recommended White cloth dried and conditioned prior to evaluation Textile Test Products 2002 AATCC Test Method 116 (Rotary Vertical Method) Method is especially useful for prints where the singling out of areas smaller than possible to test with Method 8 is required Wet and dry tests specified 20 complete turns specified Evaluation performed with the Gray Scale for Staining Textile Test Products 2002 AATCC Test Method 165 (Carpets) Testing before/after treatments such as shampooing, steam or hot water extraction, or antistatic/antisoil application has been found useful Wet and Dry testing specified Ten complete turns (one per second) specified Evaluate with Gray Scale for Staining Textile Test Products 2002 AATCC Crockmeter - CM-1 Manual unit recommended for shorter tests Has cycle counter Comes standard with 16 mm finger and 9 newton arm For wet and dry tests Textile Test Products 2002 • Cloth, abrasive paper, and spring clip supplied CM-5 Crockmeter Automatic unit recommended for long/frequent tests Electrically powered Count-up timer with automatic shut down • Cloth, abrasive paper, and spring clip supplied Textile Test Products 2002 CM-6 Crockmeter Manual unit Reciprocating rotary motion to meet AATCC Test Method 116 Can be used for wet and dry testing Textile Test Products 2002 Verification checks are extremely important to avoid incorrect results. Potential problems include: Crocking finger may need resurfacing Loose clips Incorrect mounting Loops to wire clips positioned downward Metal base warped Use Crocking Calibration Cloth!! Textile Test Products 2002 Crockmeter Testing Non-textile applications Paint scratch and mar UV curable inks using methyl ethyl ketone (MEK) Plastic abrasion Copier toners Image fastness • ASTM F1319 Textile Test Products 2002 Abrasion Resistance AATCC Accelerotor® Simulates dry, moist or wet abrasion Watertight test chamber Different grade liners Reference AATCC Test Method 93 Textile Test Products 2002 AATCC Accelerotor® Fabric rotated within an abrasive lined cylinder Fabric subjected to: flexing rubbing shock compression stretching other mechanical forces Textile Test Products 2002 AATCC Accelerotor® Results affected by: length of time size and shape of impeller rotational speed abrasive liner Textile Test Products 2002 AATCC Accelerotor® Typical tests run 2-6 minutes • Special sizes and shapes of rotors are available Textile Test Products 2002 Specimen Preparation and Evaluation Method A (Weight Loss) Specimen size determined by weight of fabric Procedure specifies measurement to 0.1% Method B (Strength Loss) Special specimen preparation requirements Procedure specifies ASTM D5034 -- “Test for Breaking Force and Elongation of Textile Fabrics (Grab Test)” Other Textile Test Products 2002 Evaluation Methods Bean Bag Snag Tester Reference ASTM Test Method D5362 Standard Test Method for Snagging Resistance of Fabrics (Bean Bag Test Method) Textile Test Products 2002 Bean Bag Snag Tester Simulates fabric snagging and picking through a tumbling action Provides good enduse simulation Textile Test Products 2002 Bean Bag Snag Tester Applicable to knits and double knits Snag and picks result from fabric tumbling against series of rotating pins Textile Test Products 2002 Snagging Resistance Snag - A yarn or part of a yarn pulled or plucked from the surface Distortion - General term for a visible defect in the texture of a fabric Protrusion - Visible group of fibers (or yarn) that extends above the fabric surface Textile Test Products 2002 Snagging Resistance Three types of snags identified: snags that have protrusion and no distortion snags that have distortion and no protrusion snags that have both distortion and protrusion Distortion - Tension on a snagged yarn: changing the size of loops within a knitted fabric causing breakage within a woven fabric Textile Test Products 2002 Bean Bag Snag Tester Uses bean bags weighing approximately 0.45 kg Automatic shut off after 100 revolutions Textile Test Products 2002 Snagging Resistance Method Laundering/Drycleaning Specimen as required preparation Make “socks” from 215mm by 115mm swatches Sew supplied bean bags in these “socks” Typical test runs 100 revolutions Specimen evaluation Textile Test Products 2002 Snagging Evaluation Option A (From ASTM D5362) ICI Photographic Snagging Standards Rating system of “5” (no snagging) to “1” (very severe snagging) Option B (From ASTM D5362) Points accumulated based on type of snag Rating system based on total number of points observed Textile Test Products 2002 Pilling Resistance Common definitions are: Fuzz - Untangled fiber ends that protrude from the surface of a yarn or fabric Pills - Bunches or balls of tangled fibers that are held to the surface of a fabric by one or more fibers Textile Test Products 2002 Pilling Resistance Standards ASTM D3512 - Standard Test Method for Pilling Resistance and Other Related Surface Changes of Textile Fabrics: Random Tumble Pilling Tester Method DIN 53867 JIS L1076 Textile Test Products 2002 Random Tumble Pilling Tester Determines resistance to pilling and related surface changes Applicable to knitted and woven fabrics Clear, lighted viewing chambers Textile Test Products 2002 Random Tumble Pilling Tester Pills result from random tumble action against a mild abrasive Cotton fiber added to initiate pill formation Air injection system Good correlation to enduse performance Textile Test Products 2002 Pilling Resistance Test Method Laundering/Drycleaning as required Specimens cut to 105mm squares 45° to the warp and fill directions Textile Test Products 2002 Pilling or Non-Pilling? Textile Test Products 2002 Pilling or Non-Pilling? Hoechst Trevira Tested the Correlation between 2 Pilling Methods With Real Wear Random Tumble Pilling Test (DIN 53867) Martindale Method (DIN 53865/ISO CD 12945/2) Textile Test Products 2002 Pilling or Non-Pilling? Benchmark (Real Wear) Setup 21 fabrics of different origins and constructions by different weavers 8 Wearers of articles for 6 weeks of different sizes/wear patterns Clothing assessed (DIN 53867) and dry-cleaned every week (5 days) Textile Test Products 2002 Pilling or Non-Pilling? Results Martindale showed greatly differing values when compared to the wear test RTPT Test showed good correlation to wear test Textile Test Products 2002 After Wear P.O.S. Wool / Linen 65/35 (290 g/linear m) 9 8 7 6 5 4 3 2 1 Be fore Cle aning Afte r Cle aning RTPT P.O.S. 0 5 10 15 20 25 30 Days 9 8 7 6 5 4 3 2 1 0 5 10 20 30 40 50 60 90 120 Minutes 9 8 7 6 5 Martindale 4 3 2 1 0 125 500 1000 2000 3000 4000 5000 6000 Revolutions After Wear P.O.S. Trevira 350/Wool 55/45 (250 g/linear m) 9 8 7 6 5 4 3 2 1 Before Cleaning After Cleaning RTPT P.O.S. 0 5 10 15 20 25 30 Days 9 8 7 6 5 4 3 2 1 0 5 10 20 30 40 50 60 90 120 Minutes 9 8 7 6 5 Martindale 4 3 2 1 0 125 500 1000 2000 3000 4000 5000 6000 Revolutions After Wear P.O.S. Trevira 350/Viscose 67/33 (360 g/linear m) 9 8 7 6 5 4 3 2 1 Be fore Cle aning Afte r Cle aning RTPT P.O.S. 0 5 10 15 20 25 30 Days 9 8 7 6 5 4 3 2 1 0 5 10 20 30 40 50 60 90 120 Minutes 9 8 7 6 5 4 Martindale 3 2 1 0 125 500 1000 2000 3000 4000 5000 Revolutions When gluing the edges of pilling specimens to prevent raveling, apply the glue with the edge of a piece of cardboard. Adhesive can be thinned with water. Textile Test Products 2002 Universal Wear Tester Other names include: Stoll Quartermaster Wear Tester Flex Abrasion Tester Surface Abrader CS 22C Textile Test Products 2002 Flexing and Abrasion Resistance Common definitions are: Abrasion - The wearing away of any part of a material by rubbing against another surface • Surface abrasion • Edge and fold abrasion • Flex abrasion Frosting - A change of fabric color caused by localized abrasive wear Textile Test Products 2002 Universal Wear Tester Used to test: Woven, knitted, napped and pile fabrics Non-woven and coated fabrics Plastic films and rubber sheeting Athletic shoe materials Textile Test Products 2002 Universal Wear Tester Other features: Frosting Attachment Continuous Change Abradant Head Edge & Fold Abrasion Clamp Electrical Depth Micrometer Textile Test Products 2002 Flexing and Abrasion Resistance Test Methods AATCC Test Method 119 (Screen Wire) AATCC Test Method 120 (Emery Method) ASTM D3885 (Flexing and Abrasion Method) ASTM D3886 (Inflated Diaphragm Method) FTMS 191-5300 and 5302 Textile Test Products 2002 Test Method Specifics (AATCC) Method 119 12.7 cm by 12.7 cm 1200 cycles suggested Uses stainless steel wire abradant Evaluate using Gray Scale Textile Test Products 2002 Method 120 10.8 cm diameter circles 100 cycles suggested Uses inflated rubber diaphragm and abradant Evaluate using Gray Scale Test Method Specifics (ASTM) Method D3885 200 mm by 38 mm 300 cycles suggested Uses yoke positioning device Evaluate for both appearance and physical changes Textile Test Products 2002 Method D3886 112 mm diameter circles Test to failure or cycle # Uses inflated rubber diaphragm and abradant Evaluate for both appearance and physical changes Fabric Streak Analyzer Used to determine cause of streaks or uneven dyeing of knitted fabric Used by knitters as a Quality Control Device • No official test method • Recommended by Cotton Inc. Textile Test Products 2002 Fabric Streak Analyzer (Principles of Operation) Optical grade polystyrene film placed on base plate Fabric placed on polystyrene Neoprene™ diaphragm placed on fabric Cover secures all layers Compressed air used to apply pressure on the fabric and polystyrene Textile Test Products 2002 Fabric Streak Analyzer (Principles of Operation) Heat applied to the base to soften the polystyrene Pressurized sample is forced into the softened polystyrene Heat turned off and cold water is circulated through the base hardening the polystyrene Fabric separated from the polystyrene Textile Test Products 2002 Fabric Streak Analyzer (Principles of Evaluation) Image If in the polystyrene examined for flaw a streak or defect is seen in the polystyrene problem belongs to the knitter If a streak or defect is NOT seen in the polystyrene problem belongs to the dyer Textile Test Products 2002 Fabric sample should extend beyond the gasket to allow air trapped between the fabric and plastic sheet to escape. Textile Test Products 2002 Laboratory Wringer Provides repeatable method for evenly extracting excess liquids from fabrics Used as an accessory to many ISO, AATCC, and ASTM methods Textile Test Products 2002 Laboratory Wringer Padder used for wetting materials prior to wringing Adjustable weights for the top roller Safety switches stop motor if rollers forced apart Textile Test Products 2002 • Neoprene® or Teflon®coated rollers available AATCC Perspiration Tester Textile Test Products 2002 Colorfastness to Perspiration Specimens of colored textiles are wet out in simulated perspiration solution, subjected to a fixed mechanical pressure and allowed to dry slowly at a slightly elevated temperature. AATCC Test Method 15 -- Perspiration AATCC Test Method 107 -- Water Textile Test Products 2002 AATCC Perspiration Tester Textile Test Products 2002 Colorfastness to Perspiration Applicable to dyed, printed or otherwise colored textile fibers, yarns and fabrics Also applicable to dyestuffs Alkaline test eliminated after studies done in 1974 Some international and special end-use still require alkaline test Textile Test Products 2002 Scorch Tester Scorch Tester used for: Colorfastness to Dry Heat Colorfastness to Pressing Tensile Loss from Chlorine Retention Textile Test Products 2002 Colorfastness to Heat AATCC Test Method 117 -- (Dry heat) Various temperature ranges depending on requirements and the stability of the fibers AATCC Test Method 133 -- (Hot pressing) Dry, damp, and wet pressing methods described depending on the end use of the textile Various temperature levels used depending on class of textile tested Textile Test Products 2002 AATCC Test Method 117 Specimen Testing size not specified time is 30 seconds Pressure specified is 40 ± 10 g/cm2 Evaluate specimens for color change using: Gray Scale for Color Change (Dyed fabrics) Gray Scale for Staining (Undyed fabrics) Textile Test Products 2002 Temperature Levels for AATCC Test Method 117 AATCC Level I Level II Level III Level IV Level V Level VI Textile Test Products 2002 149 ± 2C 163 ± 2C 177 ± 2C 191 ± 2C 205 ± 2C 219 ± 2C Temperature Levels for AATCC Test Method 117 ISO Level I Level II Level III Textile Test Products 2002 150 ± 2C 180 ± 2C 210 ± 2C AATCC Test Method 133 Dry Pressing -- Dry specimen pressed with heating device Damp Pressing -- Dry specimen covered with wet, undyed cotton cloth, then pressed with heating device Wet Pressing -- Wet specimen covered with wet, undyed cotton cloth, then pressed with heating device Textile Test Products 2002 AATCC Test Method 133 Temperatures specified: 110 ± 2C 150 ± 2C 200 ± 2C Table I of this test method identifies safe ironing temperatures for most fabrics Textile Test Products 2002 AATCC Test Method 133 Specimen size of 12cm by 4cm is recommended Yarn or thread, knitted to a fabric of above dimensions, is acceptable Dry, damp, and wet pressing all require 15 seconds of testing Evaluate Textile Test Products 2002 using Gray Scale for Color Change Scorch Tester Used for both Test Methods 117 and 133 Upper plate hinged for sample removal Adjustable pressure Thermostatic control Pyrometer temperature indicator Textile Test Products 2002 Fixotest® Textile Test Products 2002 Designed for the European market CE approved Meets ISO 105 P01, ISO 105 X11, AATCC TM 117 & 133 Tensile Loss Due to Chlorine Retention AATCC Test Method 92 (Single sample method) AATCC Test Method 114 (Multiple sample method) Textile Test Products 2002 Tensile Loss Due to Chlorine Retention (Single Sample) Fabrics treated in sodium hypochlorite solution, rinsed, dried, and pressed between metal plates Solution should contain 0.25% available chlorine at a pH of 9.5 Uses stock solution (such as Clorox) diluted with distilled water Textile Test Products 2002 Tensile Loss Due to Chlorine Retention (Single Sample) Recommended sample size is 35.6cm (warp direction) by 20.3cm (fill direction) Chlorination step involves wetting, bath in solution, and rinsing a total of six times Samples are to be air dried Five strips cut from specimen (for tensile test) Textile Test Products 2002 Tensile Loss Due to Chlorine Retention (Multiple Sample) Specimens are prepared using an automatic washing machine and tumble dryer Washing, chlorination, and drying settings are specified in the Test Method Specimen and tensile strip size are identical to the Single Sample Method Textile Test Products 2002 Tensile Loss Due to Chlorine Retention (Single Sample) Recommended sample size is 35.6cm (warp direction) by 20.3cm (fill direction) Chlorination step involves wetting, bath in solution, and rinsing a total of six times Samples are to be air dried Five strips cut from specimen (for tensile test) Textile Test Products 2002 Tensile Loss Due to Chlorine Retention (Multiple Sample) Specimens are prepared using an automatic washing machine and tumble dryer Washing, chlorination, and drying settings are specified in the Test Method Specimen and tensile strip size are identical to the Single Sample Method Textile Test Products 2002 Tensile Loss Due to Chlorine Retention Strips scorched for 30 seconds as shown below: Heating Plate Strip specimen Scorched Area Textile Test Products 2002 Tensile Loss Due to Chlorine Retention Tensile testing should be performed on unchlorinated, unscorched, and scorched specimens Calculate tensile strength and report as a percentage loss Textile Test Products 2002 Water Repellency: Tumble Jar Dynamic Absorption Test Absorbency - the propensity of a material to take in and retain a liquid, usually water, in the pores and interstices of the material Water Repellency - The characteristic of a fiber, yarn or fabric to resist wetting Textile Test Products 2002 Dynamic Absorption Tester Set of specimens placed into tumble jar with distilled water 20 minute cycle Specimens dried with Lab Wringer Weighed to nearest 0.1g Textile Test Products 2002 Water Repellency: Tumble Jar Dynamic Absorption Test Specimens cut into five 20.3cm x 20.3cm squares Squares cut on 45° bias Liquid latex or rubber cement spread on edges to prevent yarns from ravelling Textile Test Products 2002 Water Repellency: Tumble Jar Dynamic Absorption Test AATCC Test Method 70 Test is suited for fabrics to which a finish (designed for water repellency) has been applied Subjects fabrics to end use conditions Not intended to measure rain penetration Test measures water into (not through) the fabric Textile Test Products 2002 QUESTIONS???? Textile Test Products 2002 New Laundering Technology Quickwash Plus Laundering Test for Shrinkage and Colorfastness Single wash/rinse/dry cycle in 15 minutes Correlates within 1% of AATCC Method 135 Correlates well with ISO 6330 Saves on labor, utilities, materials and TIME Victoria’s Secret Stores March 2, 2001 New Test Methods AATCC TM 187-2000 Dimensional Stability of Fabrics: Accelerated Victoria’s Secret Stores March 2, 2001 Correlation Quickwash v. 5 cycles AATCC TM 135 12 12 % lengthwise shrinkage % widthwise shrinkage 10 10 8 8 6 6 4 4 2 2 0 Fleece Twill Jersey Oxford Pique 0 Fleece Quickwash Test AATCC TM 135 test 5 cycles Victoria’s Secret Stores March 2, 2001 Twill Jersey Oxford Pique Quickwash Accessories QuickView™ Optical measurement for fabric shrinkage testing Uses digital camera with microprocessor analysis No grid placement or alignment required Victoria’s Secret Stores March 2, 2001 Quickwash Accessories QuickTemp™ Electronic temperature controller for domestic laundry machines used in a laboratory Control wash and rinse water temperature within 1°C Victoria’s Secret Stores March 2, 2001 Specimen Preparation Accessories QuickPunch™ Tabletop device for stamping out multiple fabric specimens Cuts precise and accurate specimens quickly and safely Prepares specimens for variety of textile tests Victoria’s Secret Stores March 2, 2001 Specimen Preparation Accessories QuickCircle™ Cut standard 100 cm2 round specimens easily Precise specimens cut by pressing a button Blade spins with equal pressure incision Victoria’s Secret Stores March 2, 2001 Specimen Preparation Accessories QuickCalc™ Determines fabric yield Converts standard 100 cm2 round specimen weight to g/m2 or oz/yd2 Features ratio analysis for blended materials Victoria’s Secret Stores March 2, 2001 Specimen Preparation Accessories QuickDry™ Dries specimens in 7 to 10 minutes Tumbling action and warm air circulation eliminates distortion Smooth specimens for easy measuring Victoria’s Secret Stores March 2, 2001 Laundering Equipment Applications Washfastness Dry Tests Cleaning Tests Efficiency of washing detergents Laboratory Textile Test Products 2002 dyeing Laundering Tests Common definitions: Washfastness - the property of a material, usually an assigned number, depicting a ranked change in its color characteristics as a result of laundering, drycleaning, or other means of soil removal Textile Test Products 2002 Common Laundering Test Methods AATCC Test Method 61 - Accelerated test for Home and Commercial Laundering AATCC Test Method 86 - Drycleaning of Applied Designs and Finishes AATCC Test Method 132 - Drycleaning AATCC Test Method 151 - Resistance to Soil Redeposition Textile Test Products 2002 Common Laundering Test Methods ISO 105 C01 through C05 - Colorfastness to washing tests which between them cover mild to severe washing procedures ISO 105 C06 - Colorfastness to domestic and commercial laundry ISO 105 D01 - Colorfastness to Drycleaning Textile Test Products 2002 AATCC Test Method 61 Accelerated test to evaluate colorfastness to laundering One 45-minute test closely approximates five hand, home or commercial washings Staining effects not as predictable Method first developed in 1950 Textile Test Products 2002 AATCC Test Method 61 Abrasive action for acceleration caused by: Frictional effects of fabric against the container, Low solution ratio Impact of steel balls on the fabric Several test methods specified for different applications Textile Test Products 2002 AATCC Test Method 61 Specimen size 5cm by 10cm or 5cm by 15cm depending on test cycle Use Multifiber Test Fabric for staining determination Test method describes specific preparation procedures for knitted fabrics, piles, and yarns Textile Test Products 2002 AATCC Test Method 61 Test No. 1A -- Hand laundering, Low Temp. Test No. 2A -- Machine laundering, Low Temp. Test No. 3A -- Heavy duty cycles, High Temp. Test No. 4A -- Chlorine test, Low % Solution Test No. 5A -- Chlorine test, High % Solution Textile Test Products 2002 AATCC Test Method 61 Test No. Temp (C) 1A 40 200 mL 0.37 None 10 45 2A 49 150 mL 0.15 None 50 45 3A 71 50 mL 0.15 None 100 45 4A 71 50 mL 0.15 0.015% 100 45 5A 49 150 mL 0.15 0.027% 50 45 Textile Test Products 2002 Liquid % No. Steel Time Volume Detergent Chlorine Balls (min.) AATCC Launder-Ometer Atlas Launder-Ometer accepted formally by AATCC Optimum agitation method Precise temperature control Programmable cycle testing Textile Test Products 2002 AATCC Launder-Ometer® AATCC Launder-Ometer® Used for washfastness testing up to 93 °C Water bath stainless steel construction Manually set thermostat 20 position stainless steel rotor Textile Test Products 2002 20 Position Rotor AATCC Launder-Ometer® Programmable thermostat Multiple step heating and cooling programs Storage for 99 programs Digital temperature display Optional pre-heater Optional rotor for special 2400 mL container size PS-5 Preheater Module Textile Test Products 2002 Atlas LP2 Launder-Ometer® High temperature dyeing up to 150 °C Washfastness tester Glycerin or water bath Microprocessor control Multiple container sizes Textile Test Products 2002 Other Laboratory Dyeing Laundering Equipment Linitest+ Laboratory Dyeing and Fastness System Referenced in ISO Colorfastness to Laundering Methods and corresponding national tests ISO 105 E12 - Fastness to milling (severe tests) Compact table top system Manufactured in Germany Textile Test Products 2002 Washfastness Testing Industries Textiles Dye laboratories Dye-stuff manufacturers Producers of detergents Textile Test Products 2002 QUESTIONS???? Textile Test Products 2002 Lightfastness Testing of Textiles Textile Test Products 2002 Colorfastness to Light - Textile Test Products 2002 Textile Testing Elements Lightfastness “The property of a material, usually an assigned number, depicting a ranked change in its color characteristics as a result of exposure of the material to sunlight or an artificial light source.” Loss of color (Fading) Fiber degradation Textile Test Products 2002 Colorfastness to Light -Test Methods AATCC Test Method 16 Used by Majority of Textile Manufacturers in USA ISO 105 B02 Used by Majority of Textile Manufacturers in Europe Approximately 60% use Air Cooled / 40% use Water Cooled SAE J1885 A severe test used by US automobile manufacturers Textile Test Products 2002 AATCC Test Method 16 Option A, D - Carbon-Arc Option C - Daylight Option E, F - Water-Cooled Xenon-Arc Option H, I, J - Air-Cooled Xenon-Arc Options for each device represent continuous or alternating light/dark cycles Textile Test Products 2002 Test Method 16 - Option C (Daylight) Test specimens exposed behind glass 2 mm single strength sheet glass Specimens should be at least 75 mm below glass surface Different exposure types will give different exposure temperature conditions Open backed - Lower temperatures (Solid) backed - Higher temperatures Textile Test Products 2002 Under Glass Exposure Rack Textile Test Products 2002 Static Indirect Glass Solar Energy Transmittance 80 60 40 20 Wavelength (nm) Textile Test Products 2002 SS Window Glass Laminated Herculite (clear) LOF EZ-Kool 400 390 380 370 360 350 340 330 320 310 300 0 Laboratory Accelerated Tests Desirable Characteristics: Exact match to end-use conditions Does not alter degradation mechanisms; i.e. “correlates” with end-use Repeatable and reproducible Independent control over stress factors Provides “acceleration” over real time Textile Test Products 2002 Lightfastness to AATCC 16 Principles Specimens (and AATCC Blue Wool Standards)are exposed under specified conditions. The duration of the exposure is usually determind by a specified amont of light exposure in AATCC Fading Units (AFU) The Lightfastness is evaluated visually by comparison of the contrasts between exposed and unexposed protions of the specimens to the steps of the „ AATCC Gray Scale for Color Change“ or instrumental by Color measurement. Lightfastness classification by evaluation versus the simultaneously exposed AATCC Blue Wool Standards Textile Test Products 2002 AATCC Fading Units One AATCC Fading Unit (AFU) is 1/20 of the exposure required to produce a color change equal to Step 4 of the Gray Scale for Color Change on an L4 Blue Wool 20 AFUs determined to be 85 kJ/m2 @ 420 nm exposure based on interlaboratory test study L4 used for instrument calibration: Fading of L4 equal to step 4 Gray Scale or Delta E 1,7 +- 0,3 in 20 +- 2 hours Textile Test Products 2002 Test Method 16 - Options E, F (Water-Cooled Xenon Arc) Option E 63°C BPT 43°C Dry Bulb Continuous Light 30% R.H. Soda Lime Outer Filter Borosilicate Inner Filter 1.10 W/m2 @ 420 nm Textile Test Products 2002 Option F 63°C BPT 43°C Dry Bulb 3.8 Hrs Light/1.0 Hrs Dark 35% R.H./90% R.H. Soda Lime Outer Filter Borosilicate Inner Filter 1.10 W/m2 @ 420 nm Relative Irradiance (W/m2 per nm) Filtered Xenon Arc Vs. Sunlight Wavelength in nanometers Textile Test Products 2002 Test Method 16 - Option H (Air-Cooled Xenon Arc) Option H 60°C BST 32°C Dry Bulb Continuous Light 30% Relative Humidity Seven special Borosilicate IR Absorbing Filters 1.25 W/m2 @ 420 nm Textile Test Products 2002 Test Method 16 - Options I, J (Air-Cooled Xenon Arc) Option I 70°C BST 43°C Dry Bulb Continuous Light 30% R.H. Soda Lime Outer Filter Quartz Inner Filter 1.10 W/m2 @ 420 nm Textile Test Products 2002 Option J 70°C BST 43°C Dry Bulb 3.8 Hrs Light/1.0 Hrs Dark 35% R.H./90% R.H. Soda Lime Outer Filter Quartz Inner Filter 1.10 W/m2 @ 420 nm Air-cooled Xenon Meets requirements of ISO 105 test methods Option for high irradiance (220 W/m2 - 300 to 400 nm) Same control features as other high-end xenon arc devices Meets requirements of Options H, I, and J Xenotest® Alpha Textile Test Products 2002 Lightfastness to ISO 105 Designation Year Title A 01 1994 General Principles A 02 1993 Grey Scale for Assessing Change in Colour A 05 1996 Instrumental Assessment of Change in Colour B 01 1994 Colourfastness to (Natural) Daylight B 02 1994 Colourfastness to Artificial Daylight: Xenon Arc Textile Test Products 2002 Weatherfastness to ISO 105 Designation Year Title B 03 1994 Colourfastness to Weathering: Outdoor exposure B 04 1994 Colourfastness to Artificial Weathering: Xenon Arc Textile Test Products 2002 ISO Blue Wool Standards Standard 1 or L2 Standard 2 or L3 Standard 3 or L4 Second Cover Standard 4 or L5 Standard 5 or L6 Standard 6 or L7 Standard 7 or L8 Standard 8 or L9 First Cover Textile Test Products 2002 Procedure and Evaluation to ISO 105 Procedure 1 : Inspection of Specimen Expose one specimen together with one set of Blue Wool Standards until a contrast equal to Grey Scale step 4 – 5 (first break) is observed between exposed and unexposed portions of the specimen Note the number of the Blue Wool Standard showing the same contrast Continue exposure until the contrast is equal to Grey Scale step 4 Change the cover mask Continue exposure until the contrast is equal to Grey Scale step 3 . Textile Test Products 2002 Procedure and Evaluation to ISO 105 Procedure 2 : Inspection of Blue Wool Standards Expose several specimens together with one set of Blue Wool Standards until a contrast equal to Grey Scale step 4 – 5 (first break) is observed between exposed and unexposed portions of the Blue Wool Standard 3 Inspect specimens and note changes compared to Standards 1 – 3 (prelimanary assessment) Continue exposure until the contrast is equal to Grey Scale step 4 – 5 on Blue Wool Standard 4 Change the cover mask Continue exposure until the contrast is equal to Grey Scale step 4 – 5 on Blue Wool Standard 6 Change the cover mask Continue exposure until the contrast is equal to Grey Scale step 4 on Blue Wool Standard 7 Textile Test Products 2002 Procedure and Evaluation to ISO 105 Procedure 3 : checking conformity with a performance specification Expose the specimens with only 2 Blue Wool Standards: the Standard of the requested lightfastness, e.g. 5 - the standard below, e g. 4 Expose until contrasts to Grey Scale Steps 4 and 3 (by changing cover masks) have been obtained on the standard of the requested lightfastness Textile Test Products 2002 Standard Requirements to ISO 105 B02 - 1994 Operation Turning Mode Filter system Light Filter with a transmission of 90% betwen 380 nm and 750 nm, falling to 0 % between 310 nm and 320 nm Irradiance recommended 42 W/m² ( 300 – 400 nm) for instruments using irradiance control features Max. Black Panel Temperature Max. Black Standard Temperature 45 °C (normal cond.)/ 60 °C low H. / 40 °C high H. 50 °C / 65 °C / 45 °C Rel.Humidity: Light Fastness on Red Control Fabric 5 Textile Test Products 2002 /6–7 /3 Instrument Settings Setting Xenotest 150 S Xenotest Alpha Filter System Lantern with 7 IR-Filters+ Lantern with 7 IR Filters Borosilicate Cylinder + Borosilicate Cylinder Irradiance (300-400nm) Power step 2 42 W/m² Max. BPT / BST (normal conditions) 45 / 50 °C 45 / 50 °C Relative Humidity (normal conditions) 40 – 50 % should be checked with Control Fabric 30 – 40 % should be checked with Control Fabric Textile Test Products 2002 Textile Test Products 2002 The answer should be on your desk! Textile Test Products 2002 Follow the directions exactly --Calibration --Instrument settings --Lamp Filters Textile Test Products 2002 Ask Questions Resources---• Atlas Representative • AATCC, ASTM, etc technical staff • Your customer • Your supplier Textile Test Products 2002 Other things to examine Specimen Thickness Specimen Mounting The irradiance received on the surfaces of an exposed specimen is inversely proportional to the square of the distance from the source. Textile Test Products 2002 Irradiance Considerations 93,000,000 miles Specimens exposed at any point (or elevation) on the earth’s surface will not be affected by distance. Textile Test Products 2002 Irradiance Considerations Different size instruments are calibrated to compensate for differences in rack diameter Features to improve uniformity Rotating rack around the light source Three-tier inclined rack design Proper lamp calibration Textile Test Products 2002 Irradiance Considerations 10 in. 9 in. Textile Test Products 2002 Irradiance Considerations Applying the inverse square law: Irradiance = (Distance1)2 (Distance2)2 (10)2 1.23 = (9)2 Conclusion: A specimen that extends one inch beyond the specimen holder will receive 1.23 times the irradiance reported by the fading device. Textile Test Products 2002 Irradiance Considerations 18.5 in. 17.5 in. Textile Test Products 2002 Irradiance Considerations Applying the inverse square law: Irradiance = (Distance1)2 (Distance2)2 (18.5)2 1.12 = (17.5)2 Conclusion: A specimen that extends one inch beyond the specimen holder will receive 1.12 times the irradiance reported by the fading device. Textile Test Products 2002 Irradiance Irradiance - Without Control 100 200 500 Time (hours) Textile Test Products 2002 600 Irradiance Irradiance With Control 100 200 500 600 Time or Radiant Exposure (kJ/m2) Textile Test Products 2002 Colorfastness to Light - Test Methods Other Lightfastness Test Methods AATCC Test Method 111 - Weather Resistance 111A, C - Carbon Arc (with/without wetting) 111B - Natural Light and Weather (Direct Exposure) 111D - Natural Light and Weather (Behind Glass) AATCC Test Method 177 - Elevated Temp. and Humidity DIN 75202 DIN 54004 Textile Test Products 2002 Direct Weathering 45° South Exposure Rack Textile Test Products 2002 Standard Reference Materials AATCC Blue Wool AATCC Blue Wool Lightfastness Standard One of a group of dyed wool fabrics distributed by AATCC for use in determining the amount of light exposure of specimens during lightfastness testing Various proportions of wool blends with a very unstable dyestuff L2 through L9 - Increasing degree of light stability Textile Test Products 2002 AATCC Blue Wool Differs from the ISO Blue Wool standards CANNOT be used interchangeably Each higher numbered standard is twice as colorfast as the proceeding number More uniform and reproducible results when the Blue Wool is backed with white cardboard Textile Test Products 2002 AATCC Blue Wool Humidity and temperature sensitive Can be used as troubleshooting tool for lightfastness equipment for many factors Color change in AATCC Blue Wool performed the same as with test textile specimens Textile Test Products 2002 AATCC Blue Wool Designed for use as a dosimeter for determining exposure This use is becoming less common with the advent of accurate radiometers L2 and L4 are used almost exclusively today Textile Test Products 2002 Radiometric Quantities (Selected) Radiant Energy: Energy passed on as electromagnetic radiation, e.g. heat, radio, light Irradiance: Radiant flux incident per unit area of surface Units = W/m2 Spectral Irradiance: Irradiance measured as a function of wavelength Units = W/m2 . nm W = Watts s = Seconds nm = Nanometer J = Joule Textile Test Products 2002 m = Meter Radiometric Quantities Radiant Exposure: (Irradiation) Time integral of irradiance J/m2 = W/m2 . s kJ/m2 = 1000 J/m2 ... To convert a value given in J/m2 to kJ/m2 , you must divide by 1000 2 kJ/m = Textile Test Products 2002 W/m2 . s 1 1000 Radiometric Quantities When exposure time is expressed in hours (h) one must convert to seconds. kJ/m2 = W 1 • h • • 3600 2 m 1000 Thus the familiar equation: kJ/m2 = W/m2 • 3.6 • h Textile Test Products 2002 s h Example Use of equation: kJ/m2 = W/m2 x 3.6 x (h) To determine duration of a test for specific radiant exposure: 500 kJ/m2 • nm @ 420nm When operating at an irradiance level of 1.10 W/m2 • nm: 500 kJ/m2 = 1.10 W/m2 x 3.6 x (h) h = Textile Test Products 2002 500 kJ/m2 1.10 W/m2 x 3.6 = 126 light hours AATCC Fading Units One AATCC Fading Unit (AFU) is 1/20 of the exposure required to produce a color change equal to Step 4 of the Gray Scale for Color Change on an L4 Blue Wool 20 AFUs determined to be 85 kJ/m2 @ 420 nm exposure based on interlaboratory test study Textile Test Products 2002 Calculation of Radiant Exposure Visual evaluation of color change of Blue Wool defined to determine (or verify) radiant exposures Many companies use spectrophotometer to measure change Spectrophotometers measure color differently than the human eye Tables that define Step 4 of Grey Scale color change confusing Because suffer Textile Test Products 2002 of confusion, reproducibility may QUESTIONS???? Textile Test Products 2002 Textile Test Products 2002 Evaluation We don’t know if the test is right if the answer isn’t understood Textile Test Products 2002 AATCC Gray Scale Designed for visual evaluation of color change or staining. Textile Test Products 2002 AATCC Gray Scale AATCC Evaluation Procedure 1 Gray Scale for Color Change Describes the scale and use for visual color evaluation Defines Step 4 to be 1.7 ± 0.3 E Color Units Based on CIE 1976 L*a*b* color scale E = [(L*)2 + (a*)2 + (b*)2 ]½ Textile Test Products 2002 AATCC Gray Scale AATCC Evaluation Procedure 7 Instrumental Assessment of the Change in Color of a Test Specimen States in scope to be an “alternative” to Evaluation Procedure 1 Defines Step 4 of Gray Scale to be 1.25 and <2.10 Based on EF which is used to represent the special gray scale color difference and separate this E from others in normal use. EF = [(L*)2 + (CF)2 + (HF)2 ]½ Textile Test Products 2002 Color Evaluation of Textiles AATCC Evaluation Procedure 1 Gray Scale for Color Change AATCC Evaluation Procedure 2 Gray Scale for Staining AATCC Evaluation Procedure 6 Instrumental Color Measurement AATCC Evaluation Procedure 7 Instrumental Assessment of the Change in Color of a Test Specimen Textile Test Products 2002 Color Evaluation - Gray Scale Definition of a Gray Scale (from AATCC) A scale consisting of pairs of standard gray chips, the pairs representing progressive differences in color or contrast corresponding to numerical colorfastness grades. Rating scale from 5 (no change) to 1(most change) Textile Test Products 2002 Color Evaluation - Gray Scale Important factors to consider when performing visual color evaluation: Light Quality (Spectral Power Distribution) Light Quantity Viewing Angle Reporting color change quantitatively and qualitatively Experience of observer Textile Test Products 2002 Color Evaluation - Gray Scale Light Quality (Spectral Power Distribution) Illuminant D75 - Overcast northern sky Illuminant D65 - Average daylight Illuminant D50 - Color photography applications Illuminant A - Home/business incandescent Illuminant F2 - “Cool white” fluorescent Textile Test Products 2002 Color Evaluation - Gray Scale Light Quantity AATCC Procedure 1 - Requires at least 538 lux (50 lumens/ft2 or footcandles) ASTM D1729 • 1080 to 1340 lux (critical evaluation) • 810 to 1880 lux (general evaluation) Large variations in output occur depending on the distance from the light source. Textile Test Products 2002 Color Evaluation - Gray Scale Viewing Angle and Conditions Incident light upon the surface - 45° ± 5° Observer viewing angle - 90° ± 5° Observer line of sight Light Source Sample plane 90° 45° Textile Test Products 2002 Color Evaluation - Gray Scale Other factors: Light source should be semi-directional to view specimen texture Surrounding area should be neutral in color Gloss of surrounding area should be low Gray scale and lighting apparatus should be checked and maintained frequently Textile Test Products 2002 Color Evaluation - Gray Scale Reporting Change in lightness - Numerical grade Change in hue - Bluer, yellower, redder, etc. Change in chroma - Change in saturation of color Metamerism - color match under a specified light source but differing spectral curves Textile Test Products 2002 Color Evaluation - Gray Scale Experience and training for gray scale evaluation is extremely important because of rating subjectivity ASTM D1499 identifies several tests for color change acuity: Color Blindness Test (Ishihara) Color Rule Test Farnsworth-Munsell 100 Hue Test Textile Test Products 2002 Triangle Test HVC (Hue, Value, and Chroma) Color Vision Skill Test Staining Evaluation - Gray Scale Same basic evaluation techniques and parameters Compared to “gray” scale using a nominally white chip as the comparison Note: The amount of color difference, based on Table I of Procedure 1 and 2, is different for each scale. Textile Test Products 2002 Color Evaluation Tools Atlas Equipment Color-Chex TLL 600/1200 Total Daylight System Variolux Other Textile Test Products 2002 manufacturers Color-Chex™ Used in several industries other than textiles All specified light sources Designed to meet specific viewing conditions • Fits on desktop Textile Test Products 2002 Variolux Used in several industries other than textiles Large viewing area Large opening for large samples Light sources have separate hour counter Textile Test Products 2002 TLL 600/1200 Total Daylight System Used in office or laboratory environments Overhead lighting system Illuminant D65 light source Produces controlled reproducible systems Textile Test Products 2002 Color Evaluation - Instrumental Geometry Diffuse (sphere) or 0/45 Illuminant Same light sources available as visual methods Color Scale 1976 CIE L* a* b* Calculating and reporting color change Textile Test Products 2002 Color Evaluation Although instrumental color evaluation provides more repeatable, precise data, it is usually the visual color evaluation that is used as the determining factor whether a material “passes or fails” any given colorfastness test. Textile Test Products 2002 Multifiber Test Fabrics Used to determine staining effects (as a result of tests) on several types of common fabric Referenced in laundering, perspiration, and other test methods Typical use is to sew test material onto Multifiber Textile Test Products 2002 Multifiber Test Fabrics Multifiber No. 1 and FB contain bands of acetate, cotton, nylon, silk, viscose rayon, and wool (0.8 cm wide bands) Multifiber No. 10, 10A, FA, and FAA contain bands of acetate, cotton, nylon, polyester, acrylic, and wool Textile Test Products 2002 QUESTIONS???? Textile Test Products 2002 Textile Testing Elements Lightfastness Washfastness Color Transfer Surface Appearance Flammability Textile Test Products 2002 Textile Testing Elements Lightfastness “The property of a material, usually an assigned number, depicting a ranked change in its color characteristics as a result of exposure of the material to sunlight or an artificial light source.” Loss of color (Fading) Fiber degradation Textile Test Products 2002 Textile Testing Elements Washfastness “The property of a material, usually an assigned number, depicting a ranked change in its color characteristics as a result of washing or laundering processes.” Color Transfer Shrinkage Fiber degradation Loss of Color (Fading) Textile Test Products 2002 Textile Testing Elements Color Transfer - Rubbing & Heat Crocking Perspiration Hot Pressing Surface Appearance Pilling Edge and Surface Abrasion Fabric Streaking Color Appearance under Light Textile Test Products 2002 Textile Testing Elements Flammability Ignition Flame Spread Heat Release (before flashover) Smoke, Toxicity (wall coverings, upholstery, etc.) Textile Test Products 2002 Flammability Testing Common definition: Flammability is those characteristics of a material that pertain to its relative ease to ignite and relative ability to sustain combustion. Textile Test Products 2002 Flammability Testing Governed by Consumer Product Safety Commission (CPSC) Apparel: Children’s Sleepwear: Textile Test Products 2002 16 CFR Part 1610 16 CFR Parts 1615 and 1616 AFC 45 Flame Chamber Used for apparel textiles • Plain surfaces • Raised fiber surfaces Also meets ASTM D 1230 Textile Test Products 2002 AFC 45 Flame Chamber Specimen positioned at 45º angle 1 second flame impingement Test stops when stop cord breaks or specimen self-extinguishes Textile Test Products 2002 AFC 45 Flame Chamber Brushing device for raised fiber surfaces Textile Test Products 2002 VFC Vertical Flame Chamber Specimens suspended vertically Flame applied for 12 seconds Char length measured • VFC with Children’s Sleepwear Burner Textile Test Products 2002 VFC Vertical Flame Chamber For testing children’s sleepwear Also used for other textiles, camping tentage, foam Also meets ASTM D 6413 and California TB-117 Textile Test Products 2002 • VFC with ASTM burner QUESTIONS???? Textile Test Products 2002 Textile Test Products 2002