ASTM D3775-17(2023) PDF

Overview

ASTM D3775-17(2023): Standard Test Method for End (Warp) and Pick (Filling) Count of Woven Fabrics is a globally recognized standard developed by ASTM International. This test method covers the measurement of end (warp) and pick (filling) count in all types of woven fabrics, providing clear guidance for textile professionals and laboratories. The standard ensures consistency and reliability in fabric analysis, supporting quality control, specification adherence, and trade requirements in the textile industry. ASTM D3775-17(2023) applies to both metric (yarns per centimeter) and English (yarns per inch) reporting systems, reflecting its international applicability.

Key Topics

• End (Warp) Count: Quantifies the number of warp yarns along the fabric’s length per specified unit distance.
• Pick (Filling) Count: Measures the number of weft (filling) yarns per unit distance across the fabric width.
• Fabric Characterization: End and pick counts are essential indicators of woven fabric structure, quality, and potential performance.
• Test Procedures: Includes methods such as visual counting, raveling yarns, using magnification devices, and calculating averages across multiple samples.
• Reporting: Results are reported as ends by picks (e.g., 100 × 40), including the measurement distance, atmospheric test conditions, and specific sample information.
• Precision and Bias: The standard outlines approaches for identifying and correcting laboratory biases, including statistical procedures for interlaboratory comparisons.
• Applicability to Narrow Fabrics: Outlines how to measure and extrapolate counts for narrow woven fabrics.

Applications

ASTM D3775-17(2023) is widely used across the textile and apparel supply chain. Its primary uses include:

• Acceptance Testing: The method is well established for verifying commercial shipments and is relied on for procurement contracts and quality assurance.
• Quality Control in Textile Manufacturing: Factories, mills, and laboratories use it to ensure fabrics meet designated specifications.
• Research and Development: Textile engineers and product developers use fabric counts to inform new fabric constructions and performance evaluations.
• Trade and Specification Compliance: The standard supports clear communication between buyers and sellers by providing universally accepted terminology and measurement methods.
• Narrow Fabric Analysis: Provides guidance for accurately determining yarn counts in ribbons, tapes, and other narrow goods.
• Interlaboratory Consistency: Details procedures for resolving discrepancies in test results between different labs, supporting industry-wide reliability.

Related Standards

• ASTM D123: Terminology Relating to Textiles
• ASTM D1776: Practice for Conditioning and Testing Textiles
• ASTM D4850: Terminology Relating to Fabrics and Fabric Test Methods
• ASTM D7023: Terminology Relating to Home Furnishings
• ASTM D8007: Test Method for Wale and Course Count of Weft Knitted Fabrics
• ANSI/ASQC Z1.4: Inspection by Attributes

Practical Value

Adopting ASTM D3775-17(2023) ensures that fabric suppliers, manufacturers, and buyers maintain high standards for woven fabric analysis. The method’s standardized approach to measuring end and pick counts helps prevent quality disputes, reduces variability between laboratories, and builds trust in textile supply chains. Its suitability for both metric and imperial reporting systems accommodates the needs of global organizations. By consistently applying this standard, companies achieve greater accuracy in fabric construction assessment, leading to better product performance and customer satisfaction.