2010NF G06-006-6:2010 Textiles - Quantitative chemical analysis - Part 6 : mixtures of viscose or certain types of cupro or modal or lyocell and cotton fibres (method using formic acid and zinc chloride).
0000 NF G06-006-6:2008
1979NF G06-034:1979 Textiles. Quantitative chemical analysis of binary mixtures of regenerated cellulose fibres and cotton.