GB/T 23981.1-2019 Active National standards

GB/T 23981.1-2019 Paints and varnishes—Determination of hiding power—Part 1:Determination of contrast ratio of white and light coloured paints

Publish Date: 2019-03-25 Implement Date: 2020-02-01 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 23981.1-2019

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Paints, pigments, and dyes

ICS Name: Paints and varnishes

Publish Date: 2019-03-25

Implement Date: 2020-02-01

Pages: 16 pages

Scope

This part of GB/T 23981 specifies the method for determining the hiding power (by contrast ratio measurement) of white or light-colored paint films with a tristimulus value Y greater than 25. In this part, the tristimulus value method is applicable to color paint films applied at a coating rate of 20 m2/L on black-and-white cardboard paper or colorless transparent polyester films. In the latter case, the tristimulus value Y is measured by placing the coated polyester film on a black and a white base plate successively. The reflectance method in this part is applicable to color paint films applied with a fixed applicator on black-and-white cardboard paper or colorless transparent polyester films. In the latter case, the reflectance is measured by placing the coated polyester film on a black and a white base plate successively. This part is applicable to the determination of the contrast ratio of white or light-colored paint with a tristimulus value Y greater than 25.