This part of GB/T 2910 specifies the method for determining the fiber content in a two-component mixture of silk and wool or other animal hair fibers by the sulfuric acid method after removal of non-fibrous substances.
GB/T 2910.18-2009 Referenced Document
GB/T 2910.1-2009 Textiles.Quantitative chemical analysis.Part 1:General principles of testing
GB/T 2910.18-2009 history
2009GB/T 2910.12-2009 Textiles.Quantitative chemical analysis.Part 12:Mixtures of acrylic,certain modacrylic,certain chlorofibres,certain elastanes and certain other fibres(method using dimethylformamide)
1997GB/T 2910-1997 Textile--Binary fibre mixtures--Quantitative chemical analysis