Quantitative chemical analysis of textile fibre blends according to ISO 1833
Testing lab
Chemical lab
Legislation
Textile Labelling Regulation (EU) 1007/2011
Testing standard
ISO 1833 (series)
Principle
ISO 1833 is designed to accurately determine the fibre content of textiles made from two or more fibre types, crucial for:
- Product labeling compliance
- Quality control
- Import/export verification
- Fraud detection
Key Parts
ISO 1833-1: General Principles of Quantitative Chemical Analysis
- Describes general procedures applicable to all fibre blend analyses.
- Includes:
- Sampling and conditioning,
- Drying and weighing,
- Use of solvents,
- Calculation methods.
Blends and solvents used
- ISO 1833-3:2020
- Mixtures of acetate with certain other fibres (method using acetone)
- ISO 1833-4:2023
- Mixtures of certain protein fibres with certain other fibres (method using hypochlorite)
- ISO 1833-5:2006
- Mixtures of viscose, cupro or modal and cotton fibres (method using sodium zincate)
- ISO 1833-6:2018
- Mixtures of viscose, certain types of cupro, modal or lyocell with certain other fibres (method using formic acid and zinc chloride)
- ISO 1833-7:2017
- Mixtures of polyamide with certain other fibres (method using formic acid)
- ISO 1833-8:2006
- Mixtures of acetate and triacetate fibres (method using acetone)
- ISO 1833-9:2019
- Mixtures of acetate with certain other fibres (method using benzyl alcohol)
- ISO 1833-10:2019
- Mixtures of triacetate or polylactide with certain other fibres (method using dichloromethane)
- ISO 1833-11:2017
- Mixtures of certain cellulose fibres with certain other fibres (method using sulfuric acid)
- ISO 1833-12:2020
- Mixtures of acrylic, certain modacrylics, certain chlorofibres, certain elastane fibres with certain other fibres (method using dimethylformamide)
- ISO 1833-13:2019
- Mixtures of certain chlorofibres with certain other fibres (method using carbon disulfide/acetone)
- ISO 1833-14:2019
- Mixtures of acetate with certain other fibres (method using glacial acetic acid)
- ISO 1833-15:2019
- Mixtures of jute with certain animal fibres (method by determining nitrogen content)
- ISO 1833-16:2019
- Mixtures of polypropylene fibres with certain other fibres (method using xylene)
- ISO 1833-17:2019
- Mixtures of cellulose fibres and certain fibres with chlorofibres and certain other fibres (method using concentrated sulfuric acid)
- ISO 1833-18:2020
- Mixtures of silk with wool or other animal hair (method using sulfuric acid)
- ISO 1833-19:2006
- Mixtures of cellulose fibres and asbestos (method by heating)
- ISO 1833-20:2018
- Mixtures of elastane with certain other fibres (method using dimethylacetamide)
- ISO 1833-21:2019
- Mixtures of chlorofibres, certain modacrylics, certain elastanes, acetates, triacetates with certain other fibres (method using cyclohexanone)
- ISO 1833-22:2020
- Mixtures of viscose or certain types of cupro or modal or lyocell with flax fibres (method using formic acid and zinc chloride)
- ISO/DIS 1833-23
- Mixtures of polyethylene and polypropylene (method using cyclohexanone)
- ISO 1833-24:2010
- Mixtures of polyester and certain other fibres (method using phenol and tetrachloroethane)
- ISO 1833-25:2020
- Mixtures of polyester with certain other fibres (method using trichloroacetic acid and chloroform)
- ISO 1833-26:2020
- Mixtures of melamine with certain other fibres (method using hot formic acid)
- ISO 1833-27:2018
- Mixtures of cellulose fibres with certain other fibres (method using aluminium sulfate)
- ISO 1833-28:2019
- Mixtures of chitosan with certain other fibres (method using diluted acetic acid)
- ISO 1833-29:2020
- Mixtures of polyamide with polypropylene/polyamide bicomponent (method using sulfuric acid)
Each method involves selective chemical dissolution: one component is dissolved, filtered off, and the residue is dried and weighed to calculate the proportion of fibres.
Applications
- Ensures compliance with textile labeling laws (e.g., EU Regulation 1007/2011),
- Used by manufacturers, testing labs, and customs authorities,
- Helps resolve disputes over fiber content claims.
Useful Document
Specific Testing Conditions
Specific conditions concerning our testing reports
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Useful Document
Testing application form
If you have received a quotation, you're welcome to fill in and sign this form, and submit a printed copy together with your sample(s). In this way we can start testing immediately, and serve you much faster!
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