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 △Ecmc(l:c) for the total colour dif-ference 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.
BS EN ISO 105-J03:1997 history
2009BS EN ISO 105-J03:2009 Textiles - Tests for colour fastness - Calculation of colour differences
1997BS EN ISO 105-J03:1997 Textiles - Tests for colour fastness - Calculation of colour differences