1.1 This standard ( Second Revision ) prescribes a method for quantitative chemical analysis of binary mixtures; in any textile form, such as fibre, yarn or fabric; of one protein fibre with certain non-protein fibres as follows:
a) Protein Fibres — Wool, chemically treated wool, raw and degummed silk, raw and bleached tussah silk, mohair, cashmere, regenerated protein fibres based on casein; and
b) Non-Protein Fibres — Cotton, regenerated cellulose, chlorofibres, polyamide, polyester, polypropylene and glass.
1.2 If several protein fibres are present, the method specified in this standard gives the total of their amounts but not their individual quantities.
NOTE—Before conducting an analysis according to this method, the fibres present in the mixture should be identified ( see IS 667 : 1981 ) and the sample to be analyzed should be freed from all non-fibrous matter ( see IS 9068 : 1979 ). Dye in the dyed fibres is consi-dered to be an integral part of the fibre and is not to be removed.
IS 2006-1988 history
1989IS 2006-1988 Methods for the quantitative chemical analysis of binary mixtures of protein fibers and certain other non-protein fibers