3305 SDC Grey Scale for Change in Colour
The grey scale consists of nine pairs of non-glossy neutral grey coloured chips, which illustrate the perceived Colour differences. These give a corresponding fastness rating of 5, 4-5, 4, 3-4, 3, 2-3, 2, 1-2, and 1.
They are used in the assessment of Colour change occurring in fastness tests as described in ISO 105-A02. They are also essential in the grading of light fastness tests when using the Light Fastness Standards.
3355 SDC Grey Scale for Staining
The grey scale consists of nine pairs of non-glossy grey and white colored chips which illustrate the perceived depth of staining. These give a corresponding fastness rating of 5, 4-5, 4, 3-4, 3, 2-3, 2, 1-2, 1.
They are used to assess the amount of staining occurring on adjacent un-dyed fabrics during fastness tests. Their use is described in ISO 105-A03.
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