NZQA registered unit standard
27901 version 1
Page 1 of 3
Title
Evaluate woolskin post tannage processes
Level
5
Credits
Purpose
6
This unit standard is for experienced people 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; evaluate
chemistry and chemicals used in woolskin post tannage
processes; evaluate woolskin post tannage processes; and
evaluate dyed woolskin product properties.
Classification
Fellmongery and Leather Processing > Leather Processing
Knowledge
Available grade
Achieved
Explanatory notes
Definition
Woolskin post tannage processes include woolskin finishing.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of woolskin post tannage process stages.
Evidence requirements
1.1
Woolskin post tannage stages are outlined in correct sequence in terms of their
purpose in achieving specified finished woolskin properties.
Range
1.2
evidence is required of four of the following – degreasing, sueding,
retanning, dyeing, dewatering, drying, finishing.
Post tannage woolskin machinery is outlined in terms of mechanical principle
and function.
Range
evidence is required of one wet work and one dry work machine
from the following – wet wheel, sammy setter, hydroextractor, dry
cleaning, dry sueder, carder, shearer, ironer.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
27901 version 1
Page 2 of 3
Outcome 2
Evaluate chemistry and chemicals used in woolskin post tannage processes.
Evidence requirements
2.1
Chemistry of post tannage stages is evaluated in terms of mechanism and
chemicals used.
Range
2.2
evidence is required of one of the following – retanning, dyeing,
ironing.
Factors that influence degreasing efficiency or woolskin dye levelness are
evaluated in terms of woolskin post tannage processes.
Outcome 3
Evaluate woolskin post tannage processes.
Evidence requirements
3.1
Woolskin post tannage processes are evaluated in relation to their use in the
production of different woolskin products.
Range
3.2
evidence is required of one of the following – rugskins, double
face, shearling.
Woolskin dyeing is evaluated in terms of the tannery process method and
chemicals used.
Range
evidence is required of one of the following – wool reserve, tone
on tone, wool only.
Outcome 4
Evaluate dyed woolskin product properties.
Evidence requirements
4.1
Dyed woolskin product properties are evaluated in terms of product use and
assessment methods.
Range
evidence is required of three of the following – light fastness, rub
fastness, launderability, perspiration fastness, dry cleanability,
water spotting, tear strength.
Replacement information
Primary Industry Training Organisation
SSB Code 101558
This unit standard replaced unit standard 8404.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
Planned review date
27901 version 1
Page 3 of 3
31 December 2017
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
21 February 2013
N/A
Consent and Moderation Requirements (CMR) reference
0033
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.
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.
Comments on this unit standard
Please contact the Primary Industry Training Organisation standards@primaryito.ac.nz if
you wish to suggest changes to the content of this unit standard.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016