ASTM D3775-17 (2023) PDF

Full title and description

ASTM D3775-17 (2023) — Standard Test Method for End (Warp) and Pick (Filling) Count of Woven Fabrics. This standard specifies procedures for determining the number of warp (ends) and filling (picks) yarns per unit length in woven fabrics using suitable magnifying and counting devices or by raveling yarns from the fabric; it applies to all types of woven fabrics and is intended for laboratory and production quality control and specification purposes.

Abstract

This test method defines how to measure warp (end) and filling (pick) counts in woven fabrics, including counting techniques (direct counting or raveling), rounding rules, sample selection across the fabric width, and unit reporting in SI (per centimetre) or English units (per inch). The method clarifies terminology (end, pick, thread count) and provides guidance for narrow fabrics and special cases such as laid‑in yarns.

General information

• Status: Current (reaffirmed / republished in 2023 as the D3775-17 edition).
• Publication date: Current edition approved in 2023 (document listing shows approval/ republication in 2023; see edition identifier D3775-17 (2023)).
• Publisher: ASTM International.
• ICS / categories: 59.080.30 (Textile and leather technology — textile test methods).
• Edition / version: D3775-17 (shown in 2023 reissue/republication).
• Number of pages: Short method (typically published as a brief test method; source record shows 4 pages for the D3775 format).

Scope

This method covers measurement of warp (end) and filling (pick) counts and is applicable to all woven fabrics. Values are reported in SI units (per centimetre) as the standard, with English units (per inch) provided for information; the method includes provisions for narrow fabrics, instructions for sampling across the width, and notes on treatment of laid‑in or plied yarns. For knitted fabrics (wale and course counts) a different method is referenced.

Key topics and requirements

• Definitions: end (warp) count, pick (filling) count, thread count — terminology aligned with ASTM textile vocabularies.
• Counting methods: direct counting with magnification or raveling and counting yarns removed from the fabric.
• Sampling: count in multiple, randomly spaced locations across the specimen (typically five positions diagonally across the sampling unit) and round counts to the nearest whole yarn.
• Units and reporting: report counts per centimetre (preferred SI) or per inch (English units); conversion guidance noted where units do not convert 1:1.
• Special cases: instructions for narrow fabrics, laid‑in yarns (count each yarn separately), and agreed statistical comparison procedures when comparing laboratory results.

Typical use and users

Used by textile testing laboratories, quality control teams in mills and fabric converters, product development and R&D groups, import/export inspectors, and standards/specification writers to quantify fabric density (ends and picks), verify supplier claims, and control manufacturing tolerances.

Related standards

References and related documents commonly cited with D3775 include ASTM terminology standards for textiles (for example D123 and D7023) and other fabric test methods such as Test Method D8007 (wale and course count for knitted fabrics). The document history shows earlier editions (D3775‑12, etc.) that D3775‑17 replaces or revises.

Keywords

warp, end count, filling, pick count, thread count, woven fabrics, textile test method, ends per inch, picks per inch, ends per cm, picks per cm.

FAQ

Q: What is this standard?

A: ASTM D3775-17 (2023) is a short ASTM test method that specifies how to determine the number of warp (ends) and filling (picks) yarns per unit length in woven fabrics.

Q: What does it cover?

A: It covers counting procedures (direct counting or raveling), sampling locations, rounding rules, unit reporting (per cm or per in), guidance for narrow fabrics and laid‑in yarns, and notes on statistical comparison of results.

Q: Who typically uses it?

A: Textile testing laboratories, mill quality control, fabric inspectors, product developers, and anyone needing a standardized measure of fabric ends and picks density for specification, compliance, or research.

Q: Is it current or superseded?

A: The D3775-17 edition is shown in 2023 reissue/ republication records and is the current ASTM test method as of the 2023 reissue; it supersedes earlier editions such as D3775‑12. Check the official ASTM document summary for the exact approval/publication dates for your jurisdiction or purchase copy.

Q: Is it part of a series?

A: It is part of ASTM's suite of textile physical test methods (Committee D13 on Fabrics and Fabric Test Methods) and is cross‑referenced with related textile standards and terminology documents (for example, D123, D7023, and D8007 for knitted fabric counts).

Q: What are the key keywords?

A: Warp, end count, pick, filling, thread count, woven fabrics, ends per inch/cm, picks per inch/cm, textile test method.