Textiles. Tests for colour fastness - Instrumental assessment of change of colour for determination of grey scale rating1 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

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high resistance to heat is required to provide certain protection during these activities

1 Conditioning

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expressed through a series of standards