Overview
ISO 3759:2011 - Textiles: Preparation, marking and measuring of fabric specimens and garments in tests for determination of dimensional change - specifies how to prepare, mark and measure textile fabrics, garments and fabric assemblies for dimensional change testing. It applies to woven and knitted fabrics and made-up textile articles (excluding certain upholstery coverings) and is used in conjunction with treatment procedures such as washing, dry‑cleaning, steaming or industrial finishing. The standard ensures consistent, reproducible measurements of shrinkage or extension after specified treatments.
Key topics and requirements
- Scope and applicability: Applies to woven and knitted fabrics and made‑up articles; not intended for some upholstery coverings. Used with ISO 3005, ISO 7771, ISO 6330, ISO 3175 or ISO 15797 treatment methods.
- Specimen selection and dimensions: Cut representative specimens (minimum 500 × 500 mm); for narrow fabrics full‑width specimens may be used. Avoid cutting within 1 m of roll ends.
- Conditioning and atmosphere: Condition specimens/garments in the standard atmosphere per ISO 139 until constant mass (no mass change > 0.25 % over 1 h intervals).
- Marking and measuring:
- Make at least three pairs of reference marks in both length and width; each pair separated by at least 350 mm and not less than 50 mm from edges.
- Use indelible ink, sewn threads, heated wire or staples (as appropriate) for marking.
- Measure with a ruler, flexible steel ruler or glass‑fibre tape (millimetre graduation) to an accuracy of 1 mm. Glass‑fibre tapes should be verified at least every 6 months.
- Garment measurement positions: Defines standard measuring points for jacket‑like garments, trousers, skirts and one‑piece articles (e.g., neckband length, centre‑back length, waist width, inside leg).
- Treatment and result expression: Subject specimens to the agreed test (washing, dry‑cleaning, steam, industrial finish), re‑measure, and calculate percentage change using the standard formula; record plus for extension and minus for shrinkage.
- Test report: Must reference ISO 3759:2011 and include article description, measuring positions, treatment details and results.
Applications and who uses it
ISO 3759 is essential for:
- Textile laboratories performing dimensional change testing
- Apparel manufacturers and quality assurance teams validating garment sizing stability after washing or finishing
- Fabric producers assessing fabric behavior during consumer or industrial laundering
- Product compliance and R&D teams comparing materials and finishes
Use cases include domestic washing tests, professional cleaning validation, industrial laundering of workwear and quality control for garment shrinkage claims.
Related standards
Keywords: ISO 3759, dimensional change, textile testing, fabric specimens, garment measurement, specimen marking, conditioning atmosphere, shrinkage testing.
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