ISO 1833-20-2018 PDF
Name in English:
St ISO 1833-20-2018
Name in Russian:
Ст ISO 1833-20-2018
Original standard ISO 1833-20-2018 in PDF full version. Additional info + preview on request
Full title and description
St ISO 1833-20:2018 — Textiles — Quantitative chemical analysis — Part 20: Mixtures of elastane with certain other fibres (method using dimethylacetamide). This standard specifies a solvent-based (dimethylacetamide, DMAc) method to determine the mass percentage of elastane in textile mixtures after removal of non‑fibrous matter.
Abstract
The document gives a quantitative chemical procedure using dimethylacetamide to dissolve and quantify certain elastane fibres present in mixtures with cotton, viscose, cupro, modal, lyocell, polyamide, polyester or wool. The method is not applicable when acrylic fibres are present. Alternatives for some elastane-containing mixtures are given by ISO 1833-12 and ISO 1833-21.
General information
- Status: Published; reviewed and confirmed (current as of most recent ISO review).
- Publication date: December 2018 (Edition 2, 2018-12).
- Publisher: International Organization for Standardization (ISO).
- ICS / categories: 59.060.01 (Textile fibres — general).
- Edition / version: Edition 2 (2018).
- Number of pages: 3 (official ISO publication listing).
Scope
Specifies a laboratory method using dimethylacetamide (DMAc) to determine the mass percentage of certain elastane fibres in textile products that are binary or multi-component mixtures with cotton, viscose, cupro, modal, lyocell, polyamide, polyester or wool. The method excludes mixtures containing acrylic fibres. The standard also notes that some elastane-containing mixtures can be analysed by ISO 1833-12 or ISO 1833-21.
Key topics and requirements
- Use of dimethylacetamide (DMAc) as the solvent to dissolve elastane selectively for gravimetric quantification.
- Sample preparation and removal of non‑fibrous matter prior to analysis.
- Applicability limited to certain elastane types and to mixtures with specified partner fibres (cotton, viscose, cupro, modal, lyocell, polyamide, polyester, wool).
- Not applicable if acrylic (polyacrylic) fibres are present in the mixture.
- References alternative ISO 1833 methods (parts 12 and 21) for analysing other elastane-containing mixtures.
Typical use and users
Used by textile testing laboratories, quality control departments in fibre and garment manufacturers, research laboratories, conformity assessment bodies and regulators needing an established chemical method to determine elastane content for labelling, specification compliance, and material characterization.
Related standards
ISO 1833 series (Textiles — Quantitative chemical analysis), particularly ISO 1833-12 and ISO 1833-21 which provide alternative methods for some elastane-containing mixtures. The 2018 edition replaces the earlier ISO 1833-20:2009. National and regional adoptions (EN/ISO, UNE, ÖNORM, etc.) exist for this part.
Keywords
elastane; DMAc; dimethylacetamide; quantitative chemical analysis; textile fibres; fibre composition; ISO 1833; gravimetric determination; mixture analysis; textile testing.
FAQ
Q: What is this standard?
A: ISO 1833-20:2018 is an international standard that specifies a laboratory method using dimethylacetamide to measure the mass percentage of certain elastane fibres in textile mixtures.
Q: What does it cover?
A: It covers sample preparation (removal of non‑fibrous matter), the solvent dissolution procedure using DMAc, and the gravimetric determination of elastane proportion in mixtures with specified fibres (cotton, viscose, cupro, modal, lyocell, polyamide, polyester, wool). The method is not suitable if acrylic fibres are present.
Q: Who typically uses it?
A: Textile test laboratories, manufacturers’ QC teams, certification and conformity assessors, researchers and regulatory bodies responsible for accurate fibre composition analysis and labelling compliance.
Q: Is it current or superseded?
A: The 2009 edition (ISO 1833-20:2009) was withdrawn and replaced by ISO 1833-20:2018. The 2018 edition was reviewed and confirmed in ISO’s review cycle and is listed as the current edition.
Q: Is it part of a series?
A: Yes — it is part of the ISO 1833 series (Textiles — Quantitative chemical analysis), which contains multiple parts each describing procedures for different fibre mixtures and solvents. ISO 1833-12 and ISO 1833-21 are specifically mentioned as alternative methods for some elastane mixtures.
Q: What are the key keywords?
A: Elastane, DMAc, dimethylacetamide, quantitative chemical analysis, textile fibres, fibre composition, gravimetric, ISO 1833.