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BS EN ISO 105-E13:1997
Textiles. Tests for colour fastness. Colour fastness to acid-felting. Severe (British Standard)
A specimen of the textile (textiles in all kinds and in all forms) in contact with adjacent fabrics is milled in solutions of acetic and/or sulfuric acid, rinsed and dried. The change in colour of the specimen and the staining of the adjacent fabrics are assessed with the grey scales.
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British Standards Institution [bsi]
British Standards Institution [bsi]