GB/T 6739-2022Paints and varnishes - Determination of film hardness by pencil test (English PDF)

6.5 of the 2006 Edition);

h) Change the "Operating Procedures" (see Clause 8 of this Edition; Clause 9 of the 2006

Edition);

i) Add "Defect Type" (see Clause 9 of this Edition);

j) Change "Precision" (see Clause 10 of this Editon; Clause 10 of the 2006 Edition);

k) Change the "Test Report" (see Clause 11 of this Edition; Clause 11 of the 2006 Edition);

l) Change the content of "Required Supplementary Information" (see Appendix B of this

Edition; Appendix A of the 2006 Edition).

This Document modified and adopted ISO 15184.2020 Paints and Varnishes - Determination

of Film Hardness by Pencil Test.

Compared with ISO 15184.2020, this Document made the following structural adjustments.

--- Appendix B corresponded to Appendix A in ISO 15184.2020.

Compared with ISO 15184.2020, this Document has many technical differences, and the

involved clauses are marked with a vertical single line (|) in the outer margin of the page. A list

of these technical differences and their causes is provided in Appendix A.

This Document made the following editorial modifications.

--- Change the editorial error in Chapter 11 c) 1) of ISO 15184.2020.

Please note some contents of this Document may involve patents. The issuing agency of this

Document shall not assume the responsibility to identify these patents.

This Document was proposed by China Petroleum and Chemical Industry Federation.

This Document shall be under the jurisdiction of National Technical Committee on Paints and

Pigments of Standardization Administration of China (SAC/TC 5).

Drafting organizations of this Document. CNOOC Changzhou Paint and Coatings Industry

Research Institute Co., Ltd.; Avic Biam New Materials Technology Engineering Co., Ltd.;

BIUGED Laboratory Instruments (Guangzhou) Co., Ltd.; Zhejiang Utop New Material Co.,

Ltd.; Ningbo Xin'an Paint Co., Ltd.; Shenzhen Grandland Environmental Protection Coatings

Co., Ltd.; Anhui Jianghuai Automobile Group Co., Ltd.; Guohengxin (Changzhou) Testing and

Certification Technology Co., Ltd.; Qingdao Jufang Environmental Protection Technology Co.,

Ltd.; Langfang AGM-KINLIN Material Technology Co., Ltd.; Union (Shaoguan) Chemical Co.,

Ltd.; Fujian Wanan Industry Group Co., Ltd.; Shanghai Research Institute of Paint & Coatings

Co., Ltd.; Hubei Baster Science and Technology Co., Ltd.; Anhui Linghu Paint Co., Ltd.;

Jiaxing Minhui Automotive Parts Co., Ltd.; Shuangta Paint Technology Co., Ltd.; SGS-CSTC

Standard Technical Services (Tianjin) Co., Ltd.; Baoji Chushi Metal Detection Limited

Liability Company; Yatu Advanced Materials Co., Ltd.; Guangdong Jiasheng Environmental

Protection High-Tech Materials Co., Ltd.; Beijing Qiyizhou New Material Technology Co., Ltd.;

Changsha Zuxing New Materials Co., Ltd.; Chinese Academy of Environmental Planning;

Qingyuan High-tech Huayuan Science and Technology Collaborative Innovation Research

Institute Co., Ltd.; Guangdong Youzhi New Materials Co., Ltd.; Yingde Yingze Chemical

Technology Co., Ltd.; Qingyuan Haoyu Chemical Technology Co., Ltd.; Giant (China) Co.,

Ltd.; Bauhinia Paints (Shanghai) Co., Ltd.; Jiangsu Canion Building Materials Co., Ltd.; Wuxi

Taihu Anticorrosive Materials Co., Ltd.; Suzhou Institute of Nano-Tech and Nano-Bionics,

CAS; ZhenGuYuan (Fujian) Waterborne Coating Technology Co., Ltd.; BEVS Industrial

(Guangzhou) Co., Ltd.; Ningbo Shintai Machinery Co., Ltd.; Zhejiang Anyi New Materials Co.,

Ltd.; and Fujian Voosun Building Materials Co., Ltd.

Chief drafting staffs of this Document. Chen Gang, Wang Chongwu, Peng Jufang, Yang Zhenbo,

Zhou Wenpei, Yang Yaliang, Cao Bihui, Xu Jinbao, Gu Erning, Liu Feng, Liu Huihui, Cui

Zhigang, Sun Xiaoguang, Tang Dongjie, Wang Meimei, Wu Ruiliang, Wu Zuogui, Fu Xianglin,

Xu Wenbin, Shi Shihang, Jing Xionggang, Ruan Weiming, Bao Youwen, Wang Lijun, Zeng

Mengjin, Wang Ning, Li Jiaqiang, Xu Zhiming, Xiao Jurong, Guo Weijie, Dao Jizhu, Hu Zihe,

Tu Jia, Liu Jiadong, Wei Chunyang, Zhang Yicai, Zeng Peigen, Ye Guoqiang, Liu Lijun, Yao

Pingcheng, Chen Fang, An Xiaowei, Wang Lizhen, Ma Kaiyi, and Zhou Lei.

This Document was first-time published in 1986; first-time revised in 1996; second-time

revised in 2006, and third-time revised hereby.

Paints and Varnishes - Determination of Film Hardness by

Pencil Test

IMPORTANT TIPS. The electronic version of this Document contains color content that

is intended to assist in the correct understanding of this Document. Therefore, users

should consider using a color printer to print this Document.