GB/T 30791-2014 "Paints and varnishes – T-bend test" specifies the method and evaluation criteria for the T-bend test of paint and varnish coatings, applicable for assessing the flexibility of coatings and their adaptability to substrate bending. The test uses a specialized T-bend testing machine or bending device to gradually bend a painted test panel according to specified radii. The coating at the bend is inspected visually or under magnification for defects such as cracking or peeling. The lowest bend grade without defects characterizes the flexibility of the coating, providing technical reference for coating application and quality control.
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 | 2014-07-08 00:00:00 | Implementation Date | 2014-12-01 00:00:00 |
