Standard No.:	GB/T 8424.3-2001
English Name:	Textiles-Tests for colour fastness-Calculation of colour differences
Chinese Name:	纺织品 色牢度试验 色差计算
Chinese Classification:	W04    Basic standards and general methods
Professional Classification:	GB    National Standard
ICS Classification:	59.080.01 59.080.01     Textiles in general 59.080.01
Issued by:	State Quality and Technology Supervision Bureau
Issued on:	2001-02-26
Implemented on:	2001-9-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	2500 words
Price(USD):	50.0
Delivery:	via email in 1 business day

This part of ISO 105 provides a method of calculating the color difference between two specimens of the same material, measured under the same conditions, such that the numerical value △Ecmc (l:c) for the total color 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 color involved, nor on the nature of the color difference. The method also provides a means for establishing the ratio of differences in lightness to chroma and to hue.

Foreword i ISO Foreword ii 1 Scope 2 Principle 3 Procedure 4 Report of calculations Appendix A (Informative) Interpretation of Results Appendix B (Informative) Representative Test Data Appendix C (Informative) Computer Program for Calculating Color Difference