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SDC Testing Assessment Aids |
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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.
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SDC Grey Scale for Staining
The grey scale consists of nine pairs of non-glossy grey and white coloured 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 in to assess the amount of staining occurring on adjacent undyed fabrics during fastness tests. Their use is described in ISO 105-A03.
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SDC Fluorescence Suppressor
This is a laminated glass plate used to overcome optical interference from fluorescent brightening agents on textile, leather and paper. This is essential when grading assessment is carried out an item containing optical brightening agents.
The laminated glass plate is supplied in an attractive protective box. |
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