NZQA registered unit standard
18569 version 6
Page 1 of 3
Title
Demonstrate knowledge of depilation chemistry and depilatory paint
preparation used in leather manufacture
Level
4
Purpose
Credits
5
This theory-based unit standard is for experienced people in
the fellmongery or leather processing industries.
People credited with this unit standard are able to demonstrate
knowledge of: the mechanism of sulphide depilation; the
preparation of a sulphide depilatory paint; and the reasons why
depilatory paint formulations are varied, in leather manufacture.
Classification
Fellmongery and Leather Processing > Fellmongery
Processing Knowledge
Available grade
Achieved
Explanatory notes
Legislation relevant to this unit standard includes but is not limited to – Hazardous
Substances and New Organisms Act 1996, Health and Safety in Employment Act 1992,
Resource Management Act 1991.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of the mechanism of sulphide depilation used in leather
manufacture.
Evidence requirements
1.1
The constituents of a sulphide based depilatory paint are explained in terms of
their function.
1.2
The chemical reaction involved in wool loosening is described in terms of using
a sulphide depilatory.
Outcome 2
Demonstrate knowledge of the preparation of a sulphide depilatory paint used in leather
manufacture.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
18569 version 6
Page 2 of 3
Evidence requirements
2.1
The process used to make a sulphide depilatory paint is described in terms of
equipment and procedure.
procedure includes but is not limited to – sulphide solution
preparation, paint formulation.
Range
2.2
The procedure used to control the make-up of a depilatory paint is described in
terms of measurements and measuring equipment.
Outcome 3
Demonstrate knowledge of the reasons why depilatory paint formulations are varied in
leather manufacture.
Evidence requirements
3.1
Different paint formulations are described in terms of reasons for variance.
3.2
An overnight paint and a Quikpul paint are compared in terms of formulation,
advantages and risks.
Planned review date
31 December 2019
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
26 September 2001
31 December 2014
Review
2
24 November 2005
31 December 2014
Review
3
19 June 2009
31 December 2015
Review
4
21 February 2013
31 December 2017
Review
5
20 March 2014
31 December 2017
Review
6
19 February 2015
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.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
18569 version 6
Page 3 of 3
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