ISO 105-B05-1993 PDF

Full title and description

ISO 105-B05:1993 — Textiles — Tests for colour fastness — Part B05: Detection and assessment of photochromism. Describes a concise test procedure to detect temporary colour changes (photochromism) in coloured textiles when exposed to intense light and to assess the immediate and post-recovery colour differences using grey-scale assessment methods.

Abstract

A specimen of coloured textile that may exhibit temporary colour change on exposure to light is exposed to a high-intensity light source for a short period (shorter than that required to cause permanent change). The colour change is assessed immediately after exposure using the grey scale for change in colour; the specimen is then stored in the dark and reassessed to determine recovery. The procedure provides a simple detection and assessment method for photochromic behaviour in textile materials.

General information

• Status: Published (International Standard; confirmed as current by ISO review).
• Publication date: October 1993 (1993-10).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 59.080.01 (Textiles in general).
• Edition / version: Edition 4 (1993).
• Number of pages: 3 (ISO published document length).

Core bibliographic data as recorded by ISO.

Scope

Specifies a test to detect and assess photochromism in textiles: exposing samples to a short, intense light dose, assessing immediate colour change with the ISO grey scale for change in colour, then allowing samples to recover in the dark and reassessing. The method is intended for coloured textiles that show reversible light-induced colour changes rather than permanent fading. It is a focused, qualitative/semiquantitative detection and assessment method rather than a long-term fading test.

Key topics and requirements

• Definition and recognition of photochromism in textile materials.
• Specification of specimen preparation and conditioning prior to test.
• Requirements for the light source (high-intensity exposure) and exposure duration appropriate to detect temporary colour shifts without causing permanent damage.
• Immediate post-exposure assessment of change in colour using the ISO grey scale for change in colour.
• Dark storage (recovery) period and reassessment to determine reversibility of the colour change.
• Interpretation guidance to classify presence/absence and degree of photochromism for quality control and comparison purposes.

Typical use and users

Used by textile test laboratories, dye and chemical manufacturers, textile mills, quality assurance teams, product development and research groups, and standards bodies to detect photochromic behaviour in dyed or printed textiles and to support material evaluation and specification. Useful during formulation of dyes, selection of materials for applications sensitive to temporary colour change (e.g., fashion, interiors, technical textiles) and for troubleshooting unexpected reversible colour shifts.

Related standards

Part of the ISO 105 series (Textiles — Tests for colour fastness). Other related parts include ISO 105-B01, B02, B03, B04, B06, B07, B08 and B10, which cover various exposures to light, weathering and reference materials; plus the A-series parts that specify grey-scale assessment and general principles for colour fastness testing. These parts together form the core test methods used for assessing textile colour fastness.

Keywords

ISO 105, photochromism, colour fastness, textiles, grey scale, light exposure, reversible colour change, textile testing, ISO/TC 38.

FAQ

Q: What is this standard?

A: ISO 105-B05:1993 is an international standard that specifies a test method to detect and assess photochromism (temporary, reversible colour change under light) in textile materials.

Q: What does it cover?

A: It covers sample exposure to a short, intense light dose, immediate evaluation of colour change using the grey scale, followed by dark storage and reassessment to determine recovery and the degree of photochromism.

Q: Who typically uses it?

A: Textile testing laboratories, dye and chemical suppliers, textile manufacturers, product developers, and quality control personnel use the method for detecting and documenting reversible light-induced colour changes in fabrics.

Q: Is it current or superseded?

A: The 1993 edition (Edition 4) is recorded as published and has been confirmed current by ISO review processes (confirmed in post-publication reviews). It superseded the earlier 1988 version. For the most up-to-date confirmation status consult the official ISO catalogue entry.

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 multiple parts addressing light, weathering, washing, rubbing and other colour-fastness related tests.

Q: What are the key keywords?

A: Photochromism, colour fastness, grey scale, textile testing, ISO 105, light exposure, reversible colour change.