BS EN ISO 105-A05:1997

Defines an instrumental method for assessment of the colour change of a test specimen in comparison of an identical untreated reference, together with the calculations made for conversion of the instrumental measurements into a grey scale rating.

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.

NOTE 1 There may be a difference between instrumental and visual assessments of specimens due to fluorescence, and/or other factors.