Product Name: Hand operated pencil hardness tester
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 is to measure the resistance of the paint film to deformation. It is indicated by pencil mark. Suitable for film hardness test.
The specifications are as follows:
1 tester: ensure that the weight of the weight is 1000 + / - 50g, which acts vertically on the intersection point between 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 scratches can be made with pencil.
A group of Chinese brand advanced drawing pencils 6h-6b. Pencil preparation; Cut off the wooden pole to expose 3mm lead core, draw a circle on sandpaper, and make the pencil tip flat to make the edge sharp.
3 the test must be carried out at a temperature of 23 ± 2 ° C and a relative humidity of 50 + / - 5%.