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GB/T 11186-2025Methods for measuring the colour of coatings (English PDF)

涂膜颜色测量方法

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Issued by

State Administration for Market Regulation; Standardization Administration of China

Level / Type

National · Recommended

Issue date

June 30, 2025

Implementation date

January 1, 2026

Scope

GB/T 11186-2025 is the English-translated version of 涂膜颜色测量方法.

GB/T 11186-2025 is the Chinese national standard on methods for measuring the colour of coatings, in the field of paint and colour industries.

The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up — which in practice is how most foreign buyers meet it.

It was issued on 30 June 2025 by the State Administration for Market Regulation; Standardization Administration of China, and has been in force since 1 January 2026.

Classification: ICS 87.040, CCS G 50. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there.

The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

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Document preview — GB/T 11186-2025

National Standard of the People's Republic of China

ICS: 87.040
Classification: G 50

Issued by: State Administration for Market Regulation; Standardization Administration of China

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Chromaticity coordinates
5 Selection of the standard colorimetric observer and the standard illuminant
6 Spectroradiometric characteristics
7 Illumination and viewing conditions
8 Selection of the illumination and viewing conditions
9 Colour measurement
10 Calculation of the colour difference
11 Test report
Annex A (normative) Colour matching functions of the 10° observer at 5 nm wavelength intervals
Annex B (normative) Relative spectral power distribution s(lambda) of standard illuminants D65 and A at 5 nm wavelength intervals
References

3 Terms and definitions

4 Chromaticity coordinates

5 Selection of the standard colorimetric observer and the standard illuminant

6 Spectroradiometric characteristics

7 Illumination and viewing conditions

8 Selection of the illumination and viewing conditions

9 Colour measurement

10 Calculation of the colour difference

11 Test report

Foreword

This document was issued on 30 June 2025 by the State Administration for Market Regulation and the Standardization Administration of the People's Republic of China, and has been in force since 1 January 2026.

It replaces GB 11186.3-1989.

Classification: ICS 87.040, CCS G 50.

About this edition

GB/T 11186-2025 is the current edition. It was issued on 30 June 2025 and has been in force since 1 January 2026, replacing GB 11186.3-1989.

GB 11186.3-1989 has been superseded: a specification that still cites it is citing a withdrawn edition.

The interval between issue and effect is the transition period. It exists so that producers, laboratories and buyers can requalify products, revise procedures and use up documentation before the new text becomes the one that applies. The date on this page is the official one from the record of the Standardization Administration.

Classification and status

GB/T 11186-2025 is classified under ICS 87.040, in the field of paint and colour industries. ICS is the International Classification for Standards, the same scheme used by ISO and by the national bodies of most countries, which is what allows a Chinese standard to be placed beside its foreign counterparts on subject rather than on number.

Its Chinese Standard Classification code is CCS G 50. CCS is the domestic scheme, a letter for the sector and two digits for the subject within it, and it is the code by which the standard is filed and searched in China.

The GB/T prefix marks a recommended national standard. It is not, in itself, law: it becomes binding when a contract names it, when a regulation or a mandatory standard refers to it, or when a producer declares conformity with it. In practice that covers most of the cases in which it will be read — a purchase specification, an inspection agreement or a certification scheme.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 19 pages — is available in the English PDF.

Referenced standards

Cited by

Similar standards

GB 30981.1-2025|GB 30981.2-2025|GB 5369-2008|GB/T 10664-2003|GB 19601-2013

Editions of GB/T 11186

Edition	Title	Revision	Status
GB/T 11186-2025	Methods for measuring the colour of coatings	current edition	Current
GB 11186.3-1989	for measuring the colour of paint films - Part 3: Calculation of colour differences	merged into this edition	Superseded

This page sells the current edition, GB/T 11186-2025. Earlier editions are listed for reference only.

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