BS EN ISO 105-A05:1997 Textiles. Tests for colour fastness - Part A05. Instrumental assessment of change of colour for determination of grey scale rating
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This part of ISO 105 specifies an instrumental method for assessing the change in colour of a test specimen in comparison to an identical untreated reference, and the calculations undertaken to convert the instrumental measurements into a grey scale rating. This method is intended as an alternative to the many national methods for visual evaluation of the effect of a colour fastness test on any textile material.
BS EN ISO 105-A05:1997 Textiles. Tests for colour fastness - Part A05. Instrumental assessment of change of colour for determination of grey scale rating