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 ?Εcmc(l: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.
EN ISO 105-J03:2009 history
2009EN ISO 105-J03:2009 Textiles - Tests for colour fastness - Part J03: Calculation of colour differences (ISO 105-J03:2009)
1997EN ISO 105-J03:1997 Textiles - Tests for Colour Fastness - Part J03: Calculation of Colour Differences ISO 105-J03: 1995, Including Technical Corrigendum 1: 1996