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ISO 105-X09:1993 Textiles -- Tests for colour fastness -- Part X09: Colour fastness to formaldehyde
standard by International Organization for Standardization, 11/01/1993
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A specimen of the textile (textiles of all kinds and in all forms) is exposed to the action of gaseous formaldehyde in a closed container. The change in colour of the specimen is assessed with the grey scale. This method is not suitable for assessing changes in colour which may occur during crease-resist finishing with urea-formaldehyde products, or in subsequent treatment of the dyeing with solutions of formaldehyde.