BS EN ISO 105-A05:1997

Textiles. Tests for colour fastness. Instrumental assessment of change of colour for determination of grey scale rating | Status: Current, Under review

1 Scope 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.