NZQA registered unit standard
23070 version 2
Page 1 of 3
Title
Demonstrate knowledge of raw materials used in glass container
manufacturing
Level
4
Credits
10
Purpose
People credited with this unit standard are able to demonstrate
knowledge of the raw materials used in glass container
manufacturing.
Classification
Glass and Glazing > Glass Container Manufacturing
Available grade
Achieved
Entry information
Recommended skills
and knowledge
Unit 18769, Receive raw materials and operate storage,
handling, and batching equipment in glass container
manufacturing; Unit 18770, Perform analytical tests for batch
and glass quality in glass container manufacturing; Unit 23068,
Control raw material weighing and delivery equipment and
operate a glass furnace; or demonstrate equivalent knowledge
and skills.
Explanatory notes
Definitions
Raw materials are major and minor raw materials.
Major raw materials are sand, soda ash, limestone, cullet.
Cullet is clean and sorted crushed glass.
Minor raw materials include selenium, iron chromite, iron pyrites, iron sand, sodium
sulphate, alumina, carbon, cobalt.
Enterprise means an organisation where training and/or assessment is taking place,
and/or where the trainee is employed.
Enterprise procedure is defined as actions which comply with the policies, systems, and
directives in a particular enterprise. Enterprise procedure must comply with the
requirements of the Health and Safety in Employment Act 1992, and subsequent
amendments.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of raw materials used in glass container manufacturing.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
23070 version 2
Page 2 of 3
Evidence requirements
1.1
The purpose and attributes of each of the raw materials used in glass container
manufacturing are described.
1.2
The advantages and disadvantages of each raw material used for glass
container manufacturing are compared in terms of container product quality and
productivity.
1.3
The basic molecular form and arrangement of container glass is described.
molecular arrangement – non-crystalline, random.
Range
1.4
The relationship between glass temperature and viscosity is described.
1.5
The sources of the raw materials used by the enterprise are identified, and the
properties peculiar to these materials described.
1.6
The importance of raw material quality and consistency is described in terms of
the implications for container product quality.
raw material quality includes – chemical specifications, sizing
specifications, refractory particle contaminants, moisture content,
decrepitation.
Range
1.7
Enterprise procedures for determining glass batch formulations are described.
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
20 November 2006
31 December 2017
Review
2
16 April 2015
N/A
Consent and Moderation Requirements (CMR) reference
0134
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.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
23070 version 2
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 (CMRs). 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 Competenz at qualifications@competenz.org.nz if you wish to suggest
changes to the content of this unit standard.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016