AS/NZS 1580.601.5:1994

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

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 BS6923:1988.

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.

First published as Joint Standard AS/NZS 1580.601.5:1994.