OTS designed the Ink Friction Tester under the standard GB/T 7706. It is used to judge the quality of interior decorative wallpaper printing ink.
The instrument is driven by a motor so that the test sample loaded with a specific weight can be rubbed on a standard surface (friction speed and frequency can be directly displayed on the LCD screen). The friction resistance of the ink can be assessed according to the number of friction and the degree of friction damage.