Table of Contents

1 -  AS/NZS 1580.601.5:1994 PAINTS AND RELATED MATERIALS-METHODS OF TEST - COLOUR-CALCULATION OF SMALL COLOUR DIFFERENCES USING THE C
1 -  PREFACE
3 -  METHOD
3 -  1 Scope
3 -  2 Principle
3 -  3 Calculation
3 -  3.1 CIELAB values
3 -  3.2 CMC values
4 -  4. Interpretation of results
4 -  4.1 General
4 -  4.2 Lightness component
4 -  4.3 Chroma component
4 -  4.4 Hue component
4 -  4.5 Colour difference of white, grey and black (achromatic) specimens
4 -  5 Test report
6 -  Appendices
6 -  Appendix A. Test data
7 -  Appendix B. Computer program

Abstract

Provides a method for calculating small colour differences between two specimens of the same material, using the CMC formula devised by the Colour Measurement Committee of the Society of Dyers. Technically identical with and reproduced from BS 6923:1988.

RECONFIRMATION NOTICE
Technical Committee CH-003 has reviewed the content of this publication and in accordance with Standards Australia procedures for reconfirmation, it has been determined that the publication is still valid and does not require change.
Certain documents referenced in the publication may have been amended since the original date of publication. Users are advised to ensure that they are using the latest versions of such documents as appropriate, unless advised otherwise in this Reconfirmation Notice.
Approved for reconfirmation in accordance with Standards Australia procedures for reconfirmation on 30 May 2013.
Approved for reconfirmation in New Zealand on behalf of the Standards Council of New Zealand on 26 August 2013.
The following are represented on Technical Committee CH-003:

Australasian Corrosion Association
Australian Paint Approval Scheme
Australian Paint Manufactures' Federation
Australian Pipeline Industry Association
Institution of Professional Engineers New Zealand
Master Painters New Zealand Association
Water Corporation Western Australia

Scope

This British Standard provides a method of calculating the colour difference between two specimens of the same material, measured under the same conditions, such that the numerical value DE, the total colour difference, quantifies the perceptibility of the colour difference or the acceptability of the colour match. The latter permits the specification of a maximum value which depends only on the closeness of match required for a given end-use and not on the colour involved nor on the nature of the colour difference.

NOTE 1.
Appendix A gives test data for use in checking computer programs, and appendix B contains a computer program for determining colour difference.

NOTE 2.
The titles of the publications referred to in this standard are listed on the inside back cover.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Standards Australia
ProductNote	Reconfirmation Notice 24-09-2013
Pages
ISBN
Committee	CH-003
Supersedes	DR 93157