ISO 105-A02-1993 cor2-2005 PDF

Full title and description

ISO 105-A02:1993 — Textiles — Tests for colour fastness — Part A02: Grey scale for assessing change in colour. This entry refers specifically to Technical Corrigendum 2 (ISO 105-A02:1993/Cor 2:2005), a one-page corrigendum amending the 1993 part A02 publication.

Abstract

Specifies the grey scale used to assess change in colour of textiles evaluated in colour-fastness testing. The document defines an essential five-step grey scale (pairs of non-glossy grey chips or swatches) and an augmented nine-step scale (including half-steps), and provides a precise colourimetric specification so working standards can be compared to a permanent record.

General information

• Status: Published (corrigendum to ISO 105-A02:1993, active/current; the parent standard was reviewed and confirmed in 2025).
• Publication date: Original part A02: September 1993 (Edition 4). Corrigendum 2 publication: 4 October 2005.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 59.080.01 (Textiles — general).
• Edition / version: Edition 4 (1993) for ISO 105-A02; Corrigendum 2 issued against Edition 4 (2005).
• Number of pages: ISO 105-A02:1993 — 2 pages (standard); ISO 105-A02:1993/Cor 2:2005 — 1 page (corrigendum).

Scope

Provides the grey scale (visual reference) and its formal colourimetric specification for assessing changes in colour of textile test specimens after exposure to mechanical, chemical or light/agro-environmental treatment in colour-fastness tests. The grey scale is intended as the visual assessment reference used alongside specific ISO 105 test methods to grade change in colour.

Key topics and requirements

• Definition and use of the essential five-step grey scale for change-in-colour assessment.
• Augmented nine-step scale (four half-steps) for finer discrimination.
• Colourimetric specification of grey scale steps so working standards can be checked and reproduced.
• Instructions on the application of the grey scale in conjunction with ISO 105 series colour-fastness test methods.
• Corrections/clarifications as issued in Technical Corrigendum 2 (2005) to the original 1993 text.

Typical use and users

Used by textile testing and quality-control laboratories, dye and textile manufacturers, research and development groups, certification bodies and standardization committees to assess and report change in colour after exposure tests. It is applied where a rapid, repeatable visual grading of colour change is required, often alongside the other parts of the ISO 105 series.

Related standards

Part of the ISO 105 series (Textiles — Tests for colour fastness). Related parts include ISO 105-A01 (general principles), ISO 105-A03 (grey scale for staining), ISO 105-B (light and weathering tests), ISO 105-C (washing and laundering tests) and many other ISO 105 sections that define methods for specific exposures and assessments. Users commonly apply A02 together with the relevant B, C, D, E or F parts for complete colour-fastness testing.

Keywords

ISO 105, A02, grey scale, colour change, colour fastness, textile testing, colourimetric specification, corrigendum, visual assessment.

FAQ

Q: What is this standard?

A: ISO 105-A02:1993 specifies the grey scale used to assess change in colour in textile colour-fastness testing; the item referenced here is the Technical Corrigendum 2 (2005) that corrects or clarifies the original 1993 text.

Q: What does it cover?

A: It defines the visual grey-scale reference (essential five-step and augmented nine-step scales), gives a precise colourimetric specification for the scale steps, and explains how the scale is applied to judge change in colour after tests.

Q: Who typically uses it?

A: Textile test laboratories, quality-control teams, dye and fabric manufacturers, standards bodies and product compliance assessors who need a repeatable visual grading method for colour change.

Q: Is it current or superseded?

A: The parent part ISO 105-A02:1993 is published (Edition 4, 1993) and has been subject to corrigenda (including Cor 2:2005). The ISO record indicates the publication was reviewed and confirmed in 2025 (the corrigendum remains part of the published record), so the document is treated as current in ISO’s catalogue. Users should always check the latest ISO catalogue or national standards body for the absolute current status before use.

Q: Is it part of a series?

A: Yes — it is one part of the ISO 105 series (Textiles — Tests for colour fastness), which contains many parts addressing different exposures (light, washing, rubbing, perspiration, etc.) and related assessment methods.

Q: What are the key keywords?

A: Grey scale, colour change, colour fastness, visual assessment, ISO 105, corrigendum, textile testing, colourimetric specification.