Chapter 13 FABRIC FINISHES 1 FINISHING PROCESSES Finish = special treatments applied to improve a fabric’s appearance, texture or performance Finishes added to reduce undesirable characteristics Some add a design like a stripe or print Some add soft, firm or smoother han 2 COLOR & DESIGN FINISHES Gray goods = fabric first off the loom lacks color Cleaned to remove oils, resins, gums or soil 3 DYEING TEXTILES Dyes are compounds that penetrate and color fibers Obtained from plants, insects, shellfish and minerals Synthetic developed by accident in 1856 4 Today computers develop exact formulas for dyeing 5 5 METHODS: Stock dyeing= natural fibers dyed before they are spun into yarns Permits yarns spinning of tweed and multicolored Solution dyeing=manufactured fibers are produced and dye is put in liquid solution and run through spinnerets (permanent part) 6 Yarn dyeing = yarns are dyed before weaving or knitting Used for plaids, checks and stripes Piece dying =dyed after weaving or knitting Garment dyeing =fabric cut and sewn into finished product and then entire garment is dyed 7 COLORFASTNESS Colorfast = fabric color won’t change Most dyes aren’t colorfast to everything Always read the label Some are supposed to loose color like denim jeans and madras (woven fabric that bleeds) 8 PRINTING TEXTILES Printing = color is transferred to the surface of a fabric to form a pattern Some printing techniques are very old and still used by some craftsmen 9 4 COMMON PRINTING METHODS 1 = screen printing Metal mesh screens stretched on frames Each screen prepared with color and design 2 = roller printing Roller chemically etched with pattern part for a particular color Raised sections of roller pick up desired color 10 3 = rotary screen printing Faster Produces 3500 yards per hour Metal foil, less costly 4 = heat-transfer printing Paper pattern for design with heat sensitive dyes Design on reverse side Transferred to fabric when heat applied 11 TEXTURE & PERFORMANCE FINISHES Texture finishes Type of finish that improves surface texture and hand 12 Calendering Fabric passes between 2 heated rollers that smooth fabric and improve luster 13 GLAZING RESIN APPLIED DURING CALENDERING TO PRODUCE HIGH POLISH OR GLAZE CHINTZ IS A GLAZED FABRIC 14 Embossing Fabric is given a raised design on surface Cire ` (suh-RAY) Super-glossy finish is obtained by applying wax Sometimes used in lightweight jackets 15 Moire` (mwah-RAY) Watered or wavy pattern is obtained by calendering 2 layers of fabric slightly off grain Used for evening wear 16 Napping Rotating wire brushes raise short fiber ends of staple yarns to create a soft and fuzzy surface called NAP Flannel is napped 17 Stone washing and acid washing Pumice stones sometimes dampened with an oxidizing bleach to laundry process Provide abrasion that makes denim look worn and partially faded 18 Mercerization Gives cotton added luster, strength, drapability Improves fiber’s affinity for dye 19 Sizing Starches or resins are added to fabric for extra body Usually only a temporary finish 20 PERFORMANCE FINISHES Antibacterial/antiseptic Finish checks the growth of bacteria, fungi (mold and mildew) Germs that cause odor, disease and infectin are reduced or even eliminated Brand names are Sanitized and Pacificate 21 Antistatic Finish reduces fabric dryness that causes static electricity Fabrics don’t cling 22 Crease-resistant CRF – resin finish that helps fabrics resist wrinkling Applied to fabrics made from fibers that wrinkling easily including cotton, rayon and flax 23 Durable press Maintain a pressed appearance despite repeated washings and wearings Through heat setting resin curing or an ammonia process fabric fibers are stabilized 100% cotton is treated this way “Wrinlke free, wrinkle resistant, no iron” 24 Flame-resistant and flame retardant Finishes reduce flaming and burinng in fabrics exposed to flame or high heat Used in children’s sleepwear Special care may be needed to maintain finish 25 Mothproof Repel moths and other fiber eating insects Wool fibers Added when dye is added 26 Shrinkage control Don’t guarantee no shrinkage But will be minimal even after laundering “Sanforized” assures that it won’t shrink more than 1% 27 Soil release Dirt and stains remove more easily Durable through 40 – 50 washings 28 Water and stain repellent Help fabric repel water and oil based stains Coated with chemical that resists water and other liquids Drops remain on surface- can get wet though May have to be redone if dry cleaned 29 Waterproof Finishes keep fabric and wearer dry Coated or treated so no water penetrates May be uncomfortable to wear but newer ones are more breathable (GorTex) 30 SUMMARY Finishes are applied to improve a fabric’s appearance, texture, and performance Some finishes are permanent and some are temporary 31 Some finishes add color or designs to fabirs or fabrics Texture finishes change a fabric’s look, feel and hand 32 Performance finishes make fabrics easier to care for and more useful Some finishes can be diminished or destroyed by improper fabric care 33