Standard No.:	GB/T 9086-2026
English Name:	The white standard plate for colorimetry and photometry
Chinese Name:	用于色度和光度测量的标准白板
Chinese Classification:	Q04    Basic standards and general methods
Professional Classification:	GB    National Standard
ICS Classification:	91.100.01 91.100.01    Construction materials in general 91.100.01
Source Content Issued by:	SAMR, SAC
Issued on:	2026-05-25
Implemented on:	2026-12-1
Status:	to be valid
Superseding:	GB/T 9086-2007 The white standard plate for colorimetry and photometry
Target Language:	English
File Format:	PDF
Word Count:	4500 words
Translation Price(USD):	135.0
Delivery:	via email in 1~3 business day

GB/T 9086-2026 The white standard plate for colorimetry and photometry English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. ICS CCS National Standard of the People's Republic of China ‌GB/T 9086-2026 The white standard plate for colorimetry and photometry 用于色度和光度测量的标准白板 Issue date: 2026-01-28 Implementation date: 2027-02-01 Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China the Standardization Administration of the People's Republic of China Contents Foreword 1 Scope 2 Normative References 3 Terms and Definitions 4 Classification 5 Requirements 6 Instruments and Measurement 7 Certificate and Marking 8 Packaging, Transport and Storage Standard white plates for colorimetric and photometric measurements 1 Scope This document specifies the classification, requirements, instruments and measurement, certificate and marking, as well as packaging, transport and storage for standard white plates used for colorimetric and photometric measurements. This document is applicable to standard white plates used for colorimetric and photometric measurements. 2 Normative References The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 3978, Standard illuminants and illuminating-viewing conditions GB/T 3979, Methods for the measurement of object colour GB 5698, Colour terminology 3 Terms and Definitions For the purposes of this document, the terms and definitions given in GB 5698 and the following apply. 3.1 perfect reflecting diffuser; PRD ideal uniform diffuser with perfect reflectance 3.2 spectral reflectance ρ(λ) measure characterizing the energy of light reflected by an object, expressed as the ratio of the radiant flux or luminous flux of wavelength λ reflected by the object surface to the radiant flux or luminous flux of wavelength λ incident on the object surface 3.3 ceramic standard white plate ceramic white plate used for photometric and colorimetric measurements, serving as the national white standard reference material 3.4 powder standard white plate powder white plate used for photometric and colorimetric measurements, serving as the national white standard reference material 4 Classification 4.1 According to the material of manufacture, they are classified into two types: ceramic standard white plates and powder standard white plates. a) Ceramic standard white plates are divided into: 4.2 According to shape, they are divided into two types: a) Circular standard white plates: diameter should be 25 mm to 100 mm, thickness should be 5 mm to 10 mm; b) Square standard white plates: side length should be 45 mm to 100 mm, thickness should be 5 mm to 10 mm. 5 Requirements 5.1 General Colorimetric and photometric measurements are based on the perfect reflecting diffuser as the standard. Measurements are generally carried out by comparing the sample with the standard white plate. A standard white plate with known spectral reflectance and tristimulus values shall be used for measurement. 5.2 Appearance 5.2.1 The surface shall be flat, free from cracks, stains and scratches that may affect service performance. 5.2.2 For pressed powder standard white plates, no powder debris shall fall off when held vertically or inverted.