Overview
ISO 8499:2003 - Knitted fabrics - Description of defects - Vocabulary is an international standard that provides a common vocabulary and clear descriptions of defects that commonly appear when inspecting knitted fabrics. It covers faults that can reduce expected fabric performance or be visibly unacceptable to a prospective purchaser. Unless otherwise stated, the definitions apply to both weft-knitted and warp-knitted fabrics. This second edition (2003) replaces the 1990 edition and was prepared by ISO/TC 38 (Textiles), SC 20 (Fabric descriptions).
Key topics
- Scope and purpose: Defines what constitutes a defect and clarifies that the presence of a described characteristic does not automatically make fabric substandard - suppliers and purchasers must agree on acceptability and tolerances.
- Structured vocabulary: Standardized terms and definitions for defects, enabling consistent communication between suppliers, buyers and inspectors.
- Organized defect categories:
- Yarn defects (e.g., broken filaments, slubs, coarse or fine yarn, soiled yarn)
- Defects in the course direction (row-related faults)
- Defects in the length (wale) direction (column-related faults)
- Defects due to dyeing, printing or finishing, or those appearing after these processes
- General defects
- Multilingual support: Official text in English and French, with equivalent German terms provided in Annex A (published under responsibility of DIN).
- Reproduction guidance: Permitted reproduction of terms and definitions for educational or implementation purposes under specific conditions.
Applications
ISO 8499 is practical for anyone involved in knitted-fabric quality assurance, including:
- Textile and knit-fabric manufacturers - to standardize internal inspection criteria and reporting.
- Quality control and inspection teams - to identify, name and classify defects consistently on inspection reports.
- Buyers, merchandisers and procurement - to define acceptance criteria and resolve disputes with suppliers.
- Laboratories and test houses - to harmonize terminology used in test reports and certificates.
- Design and finishing teams - to understand defects that may appear after dyeing, printing or finishing and plan corrective measures.
Using ISO 8499 reduces ambiguity in defect communication, improves quality management, and helps enforce contractual acceptance limits.
Related guidance
- Prepared by ISO/TC 38, SC 20 (Fabric descriptions). For complete implementation, use ISO 8499 alongside company inspection procedures and any contractual or regional textile quality standards. Refer to the published standard text for exact definitions, annexes and legal reproduction conditions.