This product is designed and manufactured according to GB/T6739-1996. The resistance of the coated surface to another object with greater hardness acting on it, that is, the resistance of the film to deformation, is measured. It is indicated by pencil marks and is suitable for the hardness test of the coated film.
The specifications are as follows:
1. tester
Make sure that the weight of the weight 1000 + / - 50g acts perpendicularly on the intersection of the pencil lead and the test bench, so that the angle between the pencil and the test bench remains unchanged at 45 degrees. The test bench can be moved and scratched with pencil.
2. a group of Zhonghua brand high-end drawing pencil H-6H. Make a pencil; peel off a wooden rod to expose a 3 mm lead core, draw a circle on sandpaper, and flatten the tip of the pencil to sharpen the edges.
3. the test must be carried out at temperatures of 23+/-2 degrees Celsius and 50+/-5% of relative humidity.
