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GB/T 9754-2025 English PDF

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GB/T 9754-2025: Paints and varnishes - Determination of gloss value at 20-degree, 60-degree and 85-degree
Status: Valid

GB/T 9754: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 9754-2025English484 Add to Cart 4 days [Need to translate] Paints and varnishes - Determination of gloss value at 20-degree, 60-degree and 85-degree Valid GB/T 9754-2025
GB/T 9754-2007English234 Add to Cart 3 days [Need to translate] Paints and varnishes -- Determination of specular gloss of non-metallic paint films at 20-degree, 60-degreeand 85-degree Valid GB/T 9754-2007
GB/T 9754-1988English319 Add to Cart 3 days [Need to translate] Paints and varnishes--Measurement of specular gloss of non-metallic paint films at 20 Degree, 60 Degree and 85 Degree Obsolete GB/T 9754-1988

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Basic data

Standard ID GB/T 9754-2025 (GB/T9754-2025)
Description (Translated English) Paints and varnishes - Determination of gloss value at 20-degree, 60-degree and 85-degree
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G50
Classification of International Standard 87.040
Word Count Estimation 24,291
Date of Issue 2025-06-30
Date of Implementation 2026-01-01
Older Standard (superseded by this standard) GB/T 9754-2007
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 9754-2025: Paints and varnishes - Determination of gloss value at 20-degree, 60-degree and 85-degree


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ICS 87.040 CCSG50 National Standard of the People's Republic of China Replaces GB/T 9754-2007 Paints and varnishes Determination of gloss at 20°, 60° and 85° (ISO 2813.2014, IDT) Released on June 30, 2025 Implementation on January 1, 2026 State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Principle 2 5 Basic Principles of Gloss Measurement 2 6 Instruments and calibration equipment 4 6.1 Gloss meter 4 6.2 Measurement Standards (Certified Reference Materials, Working Measurement Standards) 5 7 Test Plate 6 7.1 Substrate 6 7.2 Treatment and coating 6 7.3 Drying and Conditioning 7 7.4 Coating thickness 7 8 Glossmeter Calibration and Adjustment 7 8.1 Preparation of instruments 7 8.2 Zero point calibration 7 8.3 Calibration and Adjustment 7 9 Step 7 9.1 Selection of geometric conditions 7 9.2 Gloss Measurement 8 10 Precision 8 10.1 General Principles 8 10.2 Repeatability limit 8 10.3 Reproducibility limit 8 11 Test Report 8 Appendix A (Normative) Possible sources of error 10 A.1 General Principles 10 A.2 Influence of surface condition 10 A.3 Influence of geometric conditions 10 A.4 Effects of Light 11 A.5 Physical Impact 12 Appendix B (Normative) Calibration Standards 13 B.1 Classification and use of calibration standards 13 B.2 Preparation of calibration standard plates 13 B.3 Disposal of calibration standards 13 Appendix C (Informative) Calculation of gloss value of initial reference standard plate 14 C.1 Physical Foundations 14 C.2 Calculation of gloss 15 Appendix D (Informative) Details on Precision 18 D.1 General notes on interlaboratory testing 18 D.2 Sample 18 D.3 Gloss meter 18 D.4 Measurement number 18 D.5 Result Presentation 18 Reference 19 Preface This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document replaces GB/T 9754-2007 "Specular gloss at 20°, 60° and 85° for paints and varnishes without metallic pigments" Compared with GB/T 9754-2007, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The "Scope" has been changed (see Chapter 1, Chapter 1 of the.2007 edition); b) “Terms and Definitions” has been modified (see Chapter 3, Chapter 3 of the.2007 edition); c) Deleted “Sampling”, “Sampling of Painted Substrates” and “Preparation of Test Panels” (see Chapters 6, 7 and 8 of the.2007 edition); d) Added “Principles” and “Basic Principles of Gloss Measurement” (see Chapters 4 and 5); e) “Instruments and calibration equipment” has been changed (see Chapter 6, Chapter 5 of the.2007 edition); f) Added "test panel" (see Chapter 7); g) Changed “Calibration and Adjustment of Gloss Meters” (see Chapter 8, Chapter 9 of the.2007 edition); h) The “Operational Steps” have been changed (see Chapter 9, Chapter 10 of the.2007 edition); i) "Precision" has been changed (see Chapter 10, Chapter 11 of the.2007 edition); j) "Test Report" has been changed (see Chapter 11, Chapter 12 of the.2007 edition); k) Added the normative appendices “Possible sources of error” and “Calibration standards” (see Appendix A and Appendix B). This document is equivalent to ISO 2813.2014 “Paints and varnishes — Determination of gloss at 20°, 60° and 85°”. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the China Petroleum and Chemical Industry Federation. This document is under the jurisdiction of the National Technical Committee on Standardization of Paints and Pigments (SAC/TC5). This document was drafted by. CNOOC Changzhou Coatings Chemical Research Institute Co., Ltd., Guohengxin (Changzhou) Testing and Certification Technology Co., Ltd., Biugeda Precision Instruments (Guangzhou) Co., Ltd., Fujian Shangruo Engineering Technology Co., Ltd., Zhejiang Yutong New Materials Co., Ltd., Xinhe New Materials Co., Ltd., Changzhou Wujin Chenguang Metal Coating Co., Ltd., Fujian Wanan Industrial Group Co., Ltd., Pushen Testing Instruments (Shanghai) Co., Ltd., Baoji Chushi Metal Detection Co., Ltd., Luofuta Coating Technology Co., Ltd., Marine Chemical Research Institute Co., Ltd. Company, Beijing Aerospace Xinli Technology Co., Ltd., Guangzhou Shenghua Industrial Co., Ltd., Meichao Group Co., Ltd., Shuangta Coating Technology Co., Ltd. Company, Jiangsu Lanling Polymer Materials Co., Ltd., Shanghai Dabao Chemical Products Co., Ltd., Wuxi Paint Factory Co., Ltd., AVIC Bermuda New Materials Materials Technology Engineering Co., Ltd., Taizhou Urban Construction Engineering Quality Inspection Co., Ltd., Changzhou Tianan Special Coatings Co., Ltd., Chengdu Product Quality Inspection Institute Co., Ltd., Guangzhou Xiangming Environmental Protection New Materials Co., Ltd., Zero One Technology (Zhejiang) Co., Ltd., Changzhou Institute of Technology, China FAW Group Corporation, and Changzhou Inspection, Testing, Standards and Certification Institute. The main drafters of this document are. Zhou Wenpei, Chen Weiming, Zhang Ping, Xie Zhengkun, Peng Jufang, Yang Yaliang, Xu Hao, Li Yuewu, Chen Ye, Yang Zhiming, Zeng Peigen, Jing Xionggang, Sun Dewang, Zhang Heng, Wang Jie, Xu Wenbin, Huang Dandan, Cao Xiaohui, Shan Xiaogang, Yang Bi, Gu Liuyan, Liu Yuejia, Zhao Ganggang, Zhao Ran, He Linmao, Liu Xiong, Guo Zesheng, Liu Jian, Han Dongxiao, Zhang Xu, Hao Yizhang, and Gu Qiang. The previous versions of the documents replaced by this document are as follows. --- First issued as GB/T 9754-1988 in 1988, first revised in.2007; ---This is the second revision. Paints and varnishes Determination of gloss at 20°, 60° and 85° 1 Scope This document describes a method for measuring the gloss of coatings at three geometries. 20°, 60° or 85°. This document applies to the gloss measurement of non-textured coatings on flat, opaque substrates. Note. When the sample being measured is different from the sample mentioned above, its gloss can be compared. However, there is no guarantee that the gloss value obtained will be consistent with the visual gloss. Subject to consensus (see Appendix A). 2 Normative references The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. Note. GB/T 9271-2008 Paints and varnishes standard test panels (ISO 1514.2004, MOD) ness) Note. GB/T 13452.2-2008 Paints and varnishes - Determination of film thickness (ISO 2808.2007, IDT) ISO 4618 Paints and varnishes—Terms and definitions Note. GB/T 5206-2015 Paints and varnishes - Terms and definitions (ISO 4618.2014, IDT) 3 Terms and Definitions For the purposes of this document, the terms and definitions defined in ISO 4618 and the following apply. 3.1 gloss An optical property of a surface characterized by its ability to specularly reflect light. NOTE. Gloss levels may be expressed as follows. high gloss, glossy, silky, semi-gloss, satin, matte and completely matte. [Source. ISO 4618.2014, 2.132] 3.2 Geometry A method of measuring gloss using a specified angle and a specified aperture. 3.3 gloss value When the aperture angles of the light source and the receiver are determined, at a specified reflection angle, the luminous flux specularly reflected from the sample surface is equal to the luminous flux from the The ratio of the luminous flux specularly reflected from a glass surface with a refractive index of 1.567 at a wavelength of 587.6 nm is multiplied by 100. Note 1.Gloss values are expressed in gloss units (GU). Gloss values cannot be interpreted or expressed as "reflectance percentage (%)". Note 2.The gloss value measured on the coating is rounded to the nearest integer (without decimal point). Note 3.For the purpose of determining the gloss scale, the gloss of polished black glass with a refractive index of 1.567 at a wavelength of 587.6 nm at 20°, 60° and 85° geometries is The value is considered to be 100.

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