GB/T 9286-2021 "Paints and varnishes — Cross-cut test" applies to paints and varnish coatings on both hard and soft substrates. It involves cutting a right-angle grid pattern through the coating down to the substrate to evaluate the coating's resistance to detachment. The test can be used as a pass/fail test or a six-level grading test and is also suitable for assessing the interlayer adhesion resistance of multi-coat systems. It is not applicable to coatings with a dry film thickness greater than 250 μm or textured coatings. The test can be conducted both in the laboratory and on-site, with specific test procedures required for different substrates, providing a standardized method for evaluating coating performance.
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 | 2021-08-20 00:00:00 | Implementation Date | 2022-03-01 00:00:00 |
