1.1 In general, the method described in this International Standards are based on the selective solution of an individual component. After the removal of a component, the insoluble residue is weighed and the proportion of soluble component is calculated from the loss in mass. The information common the analysis by this method of all fibre mixtures, whatever their composition, is given in clause 2 of this Pakistan Standard. This should be used in conjunction with the succeeding individual clauses of the document which contain the detailed procedures applicable to particular fibre mixture. Where, occasionally, on analysis is based on a principle other than selective solution, full detailes are given in the appropriate clause, concerning the parti cular binary mixture.
1.1.1 Mixtures of fibres during processing and to a lesser extent, finished textiles may contain fats, waxes or dressings, either occurring naturally or added to facilitate processing Salts and other water soluble matter may also be present. Some or all of those substance would be removed during analysis, and calculated as the solution fibre component. To avoid this error, non-fibrous matter must be removed before analysis and a method of pre-treatment for removing oils fats, waxes and water soluble matter is given in clause 2.
1.1.2 In ad
PS 1448-1979 history
1979PS 1448-1979 SPECIFICATION FOR QUANTITATIVE CHEMICAL ANALYSIS OF BINARY FIBRE MIXTURE