This part of ISO 105 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 A?cmc(/:c) for the total colour difference quantifies the extent to which the two specimens do not match. It permits the specification of a maximum value (tolerance) 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. The method also provides a means for establishing the ratio of differences in lightness to chroma and to hue.
NOTE 1 Annex A gives guidance on the interpretation of results. Annex B provides sample test data for use in checking computer programs. Annex C contains a sample computer program for calculating colour difference.
SANS 105-J03:2003 history
2010SANS 105-J03:2010 Textiles - Tests for colour fastness Part J03: Calculation of colour differences
2003SANS 105-J03:2003 Textiles - Tests for colour fastness Part J03: Calculation of colour differences