GB/T 6739-2022 Active National standards

GB/T 6739-2022 Paints and varnishes—Determination of film hardness by pencil test

GB/T 6739-2022 Paints and varnishes—Determination of film hardness by pencil test

Publish Date: 2022-12-30 Implement Date: 2023-07-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 6739-2022

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Paints, pigments, and dyes

ICS Name: Paints and varnishes

Publish Date: 2022-12-30

Implement Date: 2023-07-01

Pages: 10 pages

Scope

This document specifies a method for determining the hardness of paint films by pushing a pencil of known hardness onto the paint film.
This document is applicable to the determination of the hardness of single-layer paint films of color paints, varnishes, and related products, as well as the hardness of the top layer of multi-layer paint films.
This document is not applicable to comparing the pencil hardness of different paint films. This document is suitable for providing a relative grading for a series of painted test panels with significant differences in pencil hardness.
This document is only applicable to the determination of the hardness of paint films on smooth surfaces.

Development Information

Word Count: 22 Thousand words Pages: 10 pages

Replace the following standards

GB/T 6739-2006 Paints and varnishes—Determination of film hardness by pencil test

Referenced Standards

ISO 4618 GB 3186-1982 Sampling paint products GB/T 3186-2006 Paints, varnishes and raw materials for paints and varnishes—Sampling GB/T 9271-1988 Paints and varnishes—Standard panels for testing GB/T 9271-2008 Paints and varnishes—Standard panels for testing GB/T 13452.2-1992 Paints and varnishes—Determination of film thickness GB/T 13452.2-2008 Paints and varnishes—Determination of film thickness GB/T 20777-2006 Paints and varnishes—Examination and preparation of samples for testing GB/T 37356-2019 Paints and varnishes—Lighting and procedure for visual assessments of coatings

Adopt standards

ISO 15184:2020

Related Standards

GB 3186-1982 Replaced

GB 3186-1982 Sampling paint products

Publish Date: 1982-09-01

GB/T 4653-1984 Active

GB/T 4653-1984 The general technical specifications on infrared radiation paints

Publish Date: 1984-08-20

GB/T 5206.1-1985 Replaced

GB/T 5206.1-1985 Paints and varnishes—Vocabulary—Part 1:General terms

Publish Date: 1985-07-16

GB/T 5207-1985 Abolished

GB/T 5207-1985 Coatings—Determination of the danger classification by flash testing (rapid equilibrium method)

Publish Date: 1985-07-16

GB/T 5208-1985 Replaced

GB/T 5208-1985 Coatings—Flash point test—Rapid equilibrium method

Publish Date: 1985-07-16

GB/T 5209-1985 Active

GB/T 5209-1985 Paints and varnishes—Determination of resistance to water—Water immersion method

Publish Date: 1985-07-16