ISO 7211-2-2024 PDF

Full title and description

ISO 7211-2:2024 — Textiles — Methods for analysis of woven fabrics construction — Part 2: Determination of number of threads per unit length. This international standard defines standardized procedures for counting the number of warp and weft threads per unit length in woven fabrics to ensure repeatable and comparable results across laboratories and industry users.

Abstract

This part of ISO 7211 specifies three accepted methods for determining the number of threads per centimetre in woven fabrics: Method A (dissection of the fabric), Method B (counting glass) and Method C (traversing thread counter). Any of the three methods may be used depending on fabric character; in cases of dispute Method A takes precedence. Results may be expressed as threads per centimetre or, for low counts, per decimetre.

General information

• Status: Published.
• Publication date: 22 August 2024.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 59.080.30 (Textile fabrics).
• Edition / version: Edition 2 (2024).
• Number of pages: 5.

Key bibliographic and lifecycle details above are recorded on the ISO catalogue entry for ISO 7211-2:2024.

Scope

This standard gives detailed procedures for counting threads in woven fabrics and specifies three alternative measurement methods (A, B and C). It covers specimen selection and preparation, recommended measuring distances depending on expected thread density, and rules for reporting results so that counts are representative of the fabric structure (including requirements for patterned or repeat weaves). The procedures are intended for routine laboratory and production quality control as well as dispute resolution where Method A is required.

Key topics and requirements

• Three measurement methods: Method A — dissection of fabric (suitable for all fabrics, preferred in disputes); Method B — counting glass (suitable for high-density fabrics, typically >50 threads/cm); Method C — traversing thread counter (mechanical/electronic counting suitable for broad use).
• Specified specimen preparation and conditioning (use standard textile conditioning atmosphere and avoid edge effects; count multiple places across the fabric to capture variability).
• Recommended measuring distances vary with expected thread density to reduce sampling error (examples and distance ranges are provided in the standard).
• Reporting conventions: threads per centimetre (or per decimetre for low counts), number of counts taken, method used and any special specimen treatment or measurement uncertainty considerations.

Typical use and users

Laboratories, textile manufacturers, fabric inspectors, quality control personnel, test houses and standards bodies use ISO 7211-2:2024 for routine thread-count measurements, specification compliance, incoming material inspection and dispute resolution between suppliers and purchasers. Researchers and textile technologists also use it when comparing fabric constructions.

Related standards

ISO 7211 is a multipart series covering analysis of woven-fabric construction; other parts address related measurements such as yarn linear density and mass of warp/weft per unit area (for example ISO 7211-5 and ISO 7211-6). National and regional adoptions (EN, DIN, BS, UNE, etc.) exist that integrate ISO 7211-2:2024 into regional collections.

Keywords

thread count; threads per centimetre; woven fabrics; counting glass; traversing thread counter; fabric dissection; textile testing; ISO 7211; fabric construction analysis.

FAQ

Q: What is this standard?

A: ISO 7211-2:2024 is an international standard that specifies methods for determining the number of threads per unit length in woven fabrics (threads per centimetre or per decimetre).

Q: What does it cover?

A: It covers three measurement methods (A: dissection; B: counting glass; C: traversing thread counter), specimen preparation and conditioning, measurement distances, and reporting conventions to ensure repeatable counts. Method A is the reference method in case of disagreement.

Q: Who typically uses it?

A: Textile producers, inspection and testing laboratories, quality-control teams, standards committees and researchers use the standard for specification checks, quality assurance and comparative testing.

Q: Is it current or superseded?

A: ISO 7211-2:2024 is the current published edition (Edition 2, published 22 August 2024) and replaces the earlier 1984 edition.

Q: Is it part of a series?

A: Yes — ISO 7211 is a multipart series of methods for analysis of woven fabric construction; other parts cover related tests such as yarn linear density and mass of warp/weft per unit area.

Q: What are the key keywords?

A: Thread count, threads per centimetre, fabric dissection, counting glass, traversing thread counter, textile testing, ISO 7211.