Textile Glossary

Fiber code

Definition

Fiber codes are standardized letter abbreviations that uniquely identify textile fibers and fiber types. They are internationally defined in standard EN ISO 2076 and enable uniform, language-independent labeling on care labels, in technical documents, and in trade. Examples include CO for cotton, WO for wool, PES for polyester, and PA for polyamide.

Use in the textile industry

In the textile industry, fiber codes are used primarily on care labels, in product descriptions, and on packaging to indicate the fiber composition of an article in a standardized and concise manner. They form the basis for raw material declaration to the trade and to consumers, and are used in shipping documents, test reports, and international sourcing. Particularly for blended fabrics, the combined listing of multiple fiber codes with percentage figures enables precise raw material identification.

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Frequently asked question

Fiber codes are standardized, neutral designations for a fiber type and apply regardless of manufacturer to all fibers of that type — for example, PES for all polyester fibers. Brand names, by contrast, are registered trademarks of individual manufacturers for a specific product line or fiber variant. On labels and in legally required fiber content declarations, only the standardized fiber codes or the corresponding generic names may be used, not brand names.

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