AATCC Test Method 20A-2014 provides a comprehensive set of procedures for the quantitative analysis of textiles. It details methods to determine moisture content, nonfibrous content (such as finishes, oils, and sizes), and the precise fiber composition of a material. The standard outlines three primary analytical approaches: mechanical separation for fabrics with distinct yarn types, chemical analysis for blended fibers, and microscopical analysis for mixtures that are difficult to separate otherwise. The chemical analysis section is particularly detailed, offering eleven different procedures using various reagents like acetone, sulfuric acid, and formic acid to selectively dissolve specific fiber types. Included tables guide the user in selecting the appropriate method for various binary and multifiber blends. This standard is essential for quality control, material verification, and accurate labeling in the textile industry.

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