2451 version 6
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Apply chemical treatments in a wool scour
Level
3
Credits
3
Purpose
This unit standard is for people working in the wool scouring industry. People
credited with this unit standard are able to identify the reasons for commonly
used chemical treatments, be able to prepare chemicals and equipment
safely, carry out tests and adjust process conditions to maintain the required
product quality.
Subfield
Textiles Manufacture
Domain
Wool Scouring
Status
Registered
Status date
25 January 1995
Date version published
25 June 2007
Planned review date
31 December 2010
Entry information
Open.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
Competenz
Accreditation and Moderation Action Plan (AMAP) reference
0030
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1
Competency will be shown in a minimum of two treatments and their associated
tests, from:
a
peroxide bleaching
b
insect resist treatments
c
pH control
d
sanitising treatments
e
metabisulphite bleaching.
2
All activities will be carried out in accordance with the Health and Safety in
Employment Act 1992.
 New Zealand Qualifications Authority 2016
2451 version 6
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Elements and performance criteria
Element 1
Demonstrate knowledge of safe chemical handling and emergency procedures.
Performance criteria
1.1
Workplace first aid procedures for chemical accidents are demonstrated
according to workplace safety procedures.
1.2
Safety equipment is located and operation of equipment demonstrated.
1.3
Dangers of chemicals used in scouring of wool are described.
1.4
Handling and storage techniques for chemicals used in treatment processes are
demonstrated according to workplace practice.
1.5
Accident reporting procedures are described according to workplace and
regulatory requirements.
Element 2
Set-up and dose scour with chemicals in preparation for treatment.
Performance criteria
2.1
Bowl conditions required for process are established according to workplace
practice.
Range
liquor flows, bowl temperatures.
2.2
Chemicals required for treatment are measured and prepared according to work
instructions.
2.3
Initial quantities of chemicals are added to scour according to process
requirement.
Element 3
Sample and test treatment conditions.
Performance criteria
3.1
Equipment/chemicals required for test are prepared according to the test
method.
3.2
Samples are taken from position in bowl specified in test method.
3.3
Samples are tested according to test method specified for treatment.
 New Zealand Qualifications Authority 2016
2451 version 6
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Element 4
Analyse test results and modify treatment conditions.
Performance criteria
4.1
Test results are compared with process tolerances to determine if process
conditions are within specified range.
4.2
Chemical additions are adjusted to maintain treatment conditions within the
specified range.
4.3
Documentation and reporting procedures are carried out according to workplace
practice.
Element 5
Carry out ‘end of treatment’ procedures.
Performance criteria
5.1
Treatment is discontinued and/or treatment bowls are discharged according to
workplace requirement and in keeping with effluent discharge requirements.
5.2
Equipment and chemical containers are cleaned and/or disposed of safely and
according to effluent discharge requirements.
Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated
authority for quality assurance, before they can report credits from assessment against
unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register
credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations
wishing to develop education and training programmes, such as minimum qualifications for
tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact Competenz info@competenz.org.nz if you wish to suggest changes to the
content of this unit standard.
 New Zealand Qualifications Authority 2016