ISO 12945-4:2020

Overview

ISO 12945-4:2020 specifies a standardised visual assessment method for determining a textile fabric’s propensity to surface pilling, fuzzing (ébouriffage) and matting (moutonnement). It applies to most woven and knitted fabrics, including napped constructions (e.g., fleeces, inlay fabrics). Specimens are prepared according to the corresponding test procedures in ISO 12945‑1, ‑2 or ‑3 and then evaluated by trained observers under controlled viewing conditions.

Key topics and requirements

• Scope: Visual evaluation of pilling, fuzzing and matting on textile surfaces; applicable to a wide range of woven and knitted fabrics (including napped fabrics).
• Specimen preparation: Follow ISO 12945‑1, ISO 12945‑2 or ISO 12945‑3 depending on the chosen mechanical stressing method.
• Assessment equipment and lighting:
  • Use a daylight artificial source D65 (per ISO 3668) with uniform illumination of at least 600 lx.
  • Lamp placement at 5°–15° to specimen plane; preheat lamp for ≥10 minutes.
  • Observer distance 30–50 cm (normal vision).
• Scoring system:
  • Separate 1–5 descriptive scales for pilling, fuzzing, and matting (5 = no change; 1 = severe change).
  • Half‑classes allowed (e.g., 3‑4 = 3.5) for intermediate assessments.
• Observers and results:
  • Multiple observers recommended; record individual scores and report the mean for each attribute.
  • If observers differ by ≥1 class, re‑evaluation is required; unresolved dissensus must be reported as minimum/maximum plus the mean.
• Supporting tools:
  • Photographic rating standards can be used by agreement between parties; any deviations or extreme‑condition evaluations must be recorded.
• Reporting: Test reports must reference ISO 12945‑4:2020 and include specimen description, number of specimens and observers, rounded mean classes, any photographic standards used, extreme conditions, and any deviations or unusual observations.

Applications and users

ISO 12945‑4:2020 is used for:

• Quality control and acceptance testing in textile manufacturing and finishing.
• Product development and comparative performance testing of fibers, yarns, fabric constructions and surface finishes.
• Lab testing by independent textile test laboratories and R&D teams to document aesthetic durability after mechanical or laundering stress.
• Retailers, specifiers and contract textile purchasers for performance verification and supplier evaluation.

Target users: textile laboratories, manufacturers, finishers, QC managers, product developers, and standards bodies.

Related standards

• ISO 12945‑1, ISO 12945‑2, ISO 12945‑3 (preparation and mechanical stressing methods)
• ISO 3668 (D65 colour/visual comparison lighting)
• ISO 16847 (related matting evaluation after cleaning)

Keywords: ISO 12945‑4:2020, pilling, fuzzing, matting, visual analysis, textile testing, fabric assessment, pilling scale, D65 lighting.