NZQA registered unit standard
27903 version 1
Page 1 of 3
Title
Analyse miscellaneous tannages
Level
5
Credits
Purpose
8
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 miscellaneous tanning agents used in leather
manufacture; analyse the mechanisms of miscellaneous
tannages; analyse miscellaneous tannage practices; and
analyse miscellaneous tanned leather characteristics.
Classification
Fellmongery and Leather Processing > Leather Processing
Knowledge
Available grade
Achieved
Explanatory notes
Definition
THPS – tetrakis hydroxymethyl phosphonium sulphate.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of miscellaneous tanning agents used in leather manufacture.
Evidence requirements
1.1
Miscellaneous non-mineral tanning agents are explained in terms of their
chemical structure.
Range
1.2
evidence is required of two, which may include but are not limited
to – aldehyde, oxazolidine, THPS, syntans.
Miscellaneous non-chrome mineral tanning agents are explained in terms of
their structure.
Range
evidence is required of two of the following – aluminium, titanium,
zirconium.
Outcome 2
Analyse the mechanisms of miscellaneous tannages.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
27903 version 1
Page 2 of 3
Evidence requirements
2.1
Mechanisms of miscellaneous tannages are analysed in terms of the interaction
of the reagent with the skin system.
evidence is required of two of the following – aldehyde, cod oil,
syntan, zirconium.
Range
Outcome 3
Analyse miscellaneous tannage practices.
Evidence requirements
3.1
Miscellaneous tannages are analysed in terms of process techniques and
conditions used in the tannery.
evidence is required of one of – aldehyde, oxazolidine, THPS,
syntan, and one of – aluminium, titanium, zirconium.
Range
3.2
Oil tannage process used to produce finished chamois leather from full
substance pickled sheep pelts are analysed in terms of process techniques and
conditions used in the tannery.
Outcome 4
Analyse miscellaneous tanned leather characteristics.
Evidence requirements
4.1
Characteristics that different miscellaneous tannages impart to finished leathers
are analysed in terms of their suitability for different purposes.
evidence is required of three of the following – aldehyde,
oxazolidine, THPS, cod oil, syntan, aluminium, zirconium.
Range
Replacement information
Planned review date
This unit standard replaced unit standard 8407.
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
Primary Industry Training Organisation
SSB Code 101558
N/A
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
27903 version 1
Page 3 of 3
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