GB/T 9271.1-2015 "Paints and varnishes—Determination of mar resistance—Part 1: Constant-load method" is applicable to the determination of the mar resistance of coatings using a constant-load scratching tester. A fixed-load stylus is moved at a uniform speed over the surface of the coating, and the depth and width of the scratch are observed under a microscope, or the visibility of the scratch is assessed visually. The material of the stylus, the radius of its tip, and the moving speed are specified. Conditioning of the coating is required before testing. This standard provides a standardized method for evaluating the scratch resistance of coatings.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | Active | ||
|---|---|---|---|
| CCS | G50 | ICS | 87.040 |
| Release Date | 2015-06-02 00:00:00 | Implementation Date | 2016-01-01 00:00:00 |
