ISO 6741-2:1987

Overview

ISO 6741-2:1987 provides internationally accepted methods for obtaining laboratory samples of textile fibres and yarns from consignments, supporting the determination of their commercial mass. Developed by the International Organization for Standardization (ISO), this standard is a crucial reference for ensuring accuracy and consistency in sampling procedures. It is especially relevant for parties involved in the commercial assessment, quality control, and verification of textile shipments. The document details sampling methods for a variety of fibre and yarn forms, contributing to reliable mass determination and facilitating fair trade in the global textile industry.

Key Topics

• Scope of Application: Covers procedures for obtaining lab samples from consignment samples, as defined in ISO 6741-1, and storing them in air-tight vessels to prevent moisture loss or gain.
• Sample Types: Describes specific sampling methods for:
  • Bulk staple in bales (hand sampling, core sampling)
  • Tow and strands in bales or cases
  • Unsupported wound or coiled packages of raw silk, sliver, top, or yarn
  • Yarn wound on supports
  • Yarn and raw silk delivered as skeins
• Sampling Apparatus: Specifies the use of air-tight, low-hygroscopicity containers, such as stoppered glass jars or polyethylene bags, to ensure sample integrity.
• Destructive Sampling: Notes that most methods described are destructive, reflecting the requirement for accurate mass determination.
• Third-Party Verification: Outlines practices primarily intended for independent parties responsible for verifying the commercial mass of textile consignments in accordance with purchase contracts.

Applications

ISO 6741-2:1987 is widely applicable across textile manufacturing, quality assurance, trading, and logistics:

• Commercial Transactions: Ensures that both buyers and sellers have a consistent basis for determining the invoice mass of consignments, often required by contracts.
• Quality Control: Enables laboratories and quality assurance teams to obtain representative samples for further testing under controlled conditions.
• Regulatory Compliance: Provides standardized procedures for mass determination, supporting adherence to international trade and testing regulations.
• Dispute Resolution: Facilitates unbiased, objective evaluation by independent third parties in case of disputes regarding consignment weight.
• Process Optimization: Assists textile producers in maintaining traceability and reproducibility in mass determination processes for raw materials and finished products.

Related Standards

• ISO 6741-1: Textiles - Fibres and yarns - Determination of commercial mass of consignments - Part 1: Mass determination and calculations.
• ISO 6741-4: Textiles - Fibres and yarns - Determination of commercial mass of consignments - Part 4: Values used for the commercial allowances and the commercial moisture regains (Technical Report).
• ISO 6348: Textiles - Determination of mass - Vocabulary.

These related documents together form a comprehensive framework for the sampling, testing, and reporting of textile fibre and yarn masses for commercial use.

Practical Value

Utilizing ISO 6741-2:1987 promotes accurate sampling, traceability, and fairness in textile transactions worldwide. By following the standardized methods outlined in this international standard, stakeholders can minimize sampling errors, ensure alignment with global best practices, and reduce potential for disputes or inaccuracies in the determination of commercial mass. This leads to improved trust and efficiency in the textile supply chain.