Friday, November 27, 2009

Colour fastness to acid chlorination of wool: Sodium dichloroisocyanurate

This part of ISO 105 specifies a method for determining the resistance of the colour of wool in all forms to acid chlorination using sodium dichloroisocyanurate 1). This simulates the manufacturing operation in which a liquid containing or liberating active chlorine under mildly acid conditions is used for imparting shrink resistant properties to wool in textiles.
A specimen of the textile (wool textiles in all forms) is treated in a formic acid buffer solution to which solutions of sodium dichloroisocyanurate and sodium hydrogen sulfite are added succesively, and is then rinsed and dried. The change in colour of the specimen is assessed with the grey scale. This treatment simulates the manufacturing operation in which a liquid containing or liberating active chlorine under mildly acid conditions is used for imparting shrink-resistant properties to wool in textiles.
For more details click here:-http://www.dfmg.com.tw/member/standard/bs/BS-X14.HTM

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