GB/T 6742-2007 "Paints and varnishes - Bend test (cylindrical mandrel)" specifies the method for assessing the flexibility of paint films using the cylindrical mandrel bend test, applicable to various types of paint and varnish films. The painted test panel is bent 180° around cylindrical mandrels of different diameters, and the film is observed for defects such as cracking or peeling. The test requires instruments such as a cylindrical mandrel bend tester, cylindrical mandrels of different specifications, and a magnifying glass, providing a standardized basis for evaluating the bending deformation resistance of paint films.
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 | 2007-09-11 00:00:00 | Implementation Date | 2008-04-01 00:00:00 |
