ISO 105-A05-1996 PDF

Full title and description

ISO 105-A05:1996 — Textiles — Tests for colour fastness — Part A05: Instrumental assessment of change in colour for determination of grey scale rating. Specifies an instrumental method for assessing the change in colour of a test specimen in comparison with an identical untreated reference and the calculations to convert instrumental measurements into a grey scale rating.

Abstract

This part of ISO 105 gives an alternative, instrument-based procedure to visual grey-scale assessment: it defines the measurement approach, required comparison with an untreated reference, and the mathematical conversions needed to report a grey-scale rating from instrumental colour-change data. The method is intended to be used alongside existing ISO 105 visual procedures and notes that instrumental results can differ from visual assessments (for example because of fluorescence).

General information

• Status: Published (International Standard, confirmed).
• Publication date: April 1996 (Edition 1, 1996-04).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 59.080.01 (Textiles in general).
• Edition / version: Edition 1 (1996).
• Number of pages: 4 pages.

(Summary details above derived from the ISO bibliographic record for ISO 105-A05:1996.)

Scope

Specifies an instrumental method to assess change in colour of a test specimen by comparison with an identical untreated reference specimen and the calculations to convert instrumental colour-change measurements into a grey-scale rating. The procedure is given as an alternative to national visual assessment methods for the effect of colour-fastness tests on textiles; it also warns that instrumental and visual results can differ (for example, due to fluorescence).

Key topics and requirements

• Instrumental measurement of colour change of test specimens versus identical untreated reference specimens.
• Calculation method to convert instrumental measurements into grey-scale ratings (i.e., mapping measured colour differences to the conventional grey-scale grades used in colour-fastness testing).
• Guidance on using the method as an alternative to visual grey-scale assessment and caution about potential differences (fluorescence, observer vs. instrument response).
• Accompanied by technical corrigenda published after the original edition to correct minor items (see Related standards).

Key method and conversion requirements are defined in the standard text.

Typical use and users

Used by textile testing laboratories, quality-control departments in textile and apparel manufacturing, independent test houses, research laboratories working on dyeing and colour stability, and standards bodies adopting instrumental alternatives to visual grey-scale assessment. It is applied when an objective, instrument-based determination of colour change is required or preferred for repeatability and traceability.

Related standards

Part of the ISO 105 series (Tests for colour fastness) which includes many related parts covering specific fastness tests and assessment procedures (for example other A-parts dealing with instrumental/digital assessment and numerous B/C/E parts for specific tests). ISO 105-A05:1996 has two technical corrigenda: ISO 105-A05:1996/Cor 1:1997 and ISO 105-A05:1996/Cor 2:2005. For broader context see other ISO 105 parts (e.g., ISO 105-A01 guidance and later A-series parts on imaging/digital techniques).

Keywords

ISO 105, colour fastness, grey scale, instrumental assessment, textile testing, colour change, reference specimen, test method, corrigendum.

FAQ

Q: What is this standard?

A: ISO 105-A05:1996 is an ISO international standard that defines an instrumental method for assessing change in colour of textile specimens and converting those measurements into the conventional grey-scale rating used in colour-fastness testing.

Q: What does it cover?

A: It covers the measurement approach (instrumental comparison with an identical untreated reference), and the calculations required to convert instrumental colour-change data into a grey-scale grade; it is intended as an alternative to visual grey-scale assessment methods.

Q: Who typically uses it?

A: Textile and apparel manufacturers, independent testing laboratories, quality-control units, research centres in textiles/dyes, and standards committees that need an objective, repeatable assessment of colour change.

Q: Is it current or superseded?

A: The published edition (Edition 1, April 1996) remains the current text of ISO 105-A05 and the ISO bibliographic record shows the publication was reviewed and confirmed (most recently confirmed on 5 July 2024). The standard has two published technical corrigenda (1997 and 2005) that correct minor items.

Q: Is it part of a series?

A: Yes — ISO 105-A05 is one part of the ISO 105 series "Textiles — Tests for colour fastness", which contains many parts addressing different test conditions, assessment methods and auxiliary requirements (A, B, C, E, F parts etc.). Some later A-series parts address digital imaging and instrumental techniques.

Q: What are the key keywords?

A: colour fastness, grey scale, instrumental assessment, ISO 105, textile testing, colour change, reference specimen, measurement conversion.