NZQA Expiring unit standard
8404 version 9
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Title
Demonstrate knowledge of woolskin post tannage processes
Level
4
Credits
Purpose
6
This unit standard is for people new to the leather industry or
those wishing to develop their technical skills in leather
manufacture.
People credited with this unit standard are able to demonstrate
knowledge of: woolskin post tannage process stages;
chemistry and chemicals used in woolskin post tannage
processes; woolskin post tannage processes; and dyed
woolskin product properties.
Classification
Leather Manufacturing > Leather Manufacture Technology
Available grade
Achieved and Merit
Explanatory notes
1
Version 3 of this unit standard introduced criteria for merit. Wherever a merit
requirement appears in this unit standard it assumes that the requirements for credit
have been met.
2
Definition
Woolskin post tannage processes include woolskin finishing.
This unit standard is
expiring
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of woolskin post tannage process stages.
Evidence requirements
1.1
Woolskin post tannage stages are described in correct sequence in terms of
their purpose in achieving specified finished woolskin properties.
Credit
Merit
1.2
four of the following – degreasing, sueding, retanning, dyeing,
dewatering, drying, finishing.
plus one other.
Post tannage woolskin machinery is described in terms of mechanical principle
and function.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
Credit
Merit
8404 version 9
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one wet work and one dry work machine from the following – wet
wheel, sammy setter, hydroextractor, dry cleaning, dry sueder,
carder, shearer, ironer.
plus one wet work and one dry work machine.
Outcome 2
Demonstrate knowledge of chemistry and chemicals used in woolskin post tannage
processes.
Evidence requirements
2.1
Chemistry of post tannage stages is described in terms of mechanism and
chemicals used.
Credit
Merit
2.2
one of the following – retanning, dyeing, ironing.
plus one other.
Factors that influence degreasing efficiency or woolskin dye levelness are
described in terms of woolskin post tannage processes.
Outcome 3
Demonstrate knowledge of woolskin post tannage processes.
Evidence requirements
3.1
Woolskin post tannage processes are discussed in relation to their use in the
production of different woolskin products.
Credit
Merit
3.2
one of the following – rugskins, double face, shearling.
plus one other.
This unit standard is
expiring
Credit
one of the following – wool reserve, tone on tone, wool only.
Woolskin dyeing is described in terms of the tannery process method and
chemicals used.
Merit
plus one other.
Outcome 4
Demonstrate knowledge of dyed woolskin product properties.
Evidence requirements
4.1
Dyed woolskin product properties are described in terms of product use and
assessment methods.
Credit
Merit
three of the following – light fastness, rub fastness, launderability,
perspiration fastness, dry cleanability, water spotting, tear
strength.
plus two others.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
8404 version 9
Page 3 of 3
Replacement information
This unit standard has been replaced by unit standard
27901
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
24 September 1996
31 December 2015
Revision
2
16 September 1997
31 December 2015
Review
3
27 April 2000
31 December 2015
Revision
4
20 February 2002
31 December 2015
Revision
5
14 October 2004
31 December 2015
Review
6
14 December 2007
31 December 2015
Review
7
21 February 2013
31 December 2015
Rollover
8
20 March 2015
31 December 2017
Rollover
9
17 September 2015
31 December 2018
Consent and Moderation Requirements (CMR) reference
0185
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
This unit standard is
expiring
Industry Training Organisations must
be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR 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.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016