The hand push pencil hardness tester is suitable for testing the hardness of paint films on various products. The resistance exhibited by the coating surface of this machine against another object with higher hardness, that is, the ability of the paint film to resist deformation, is measured and expressed in pencil hardness grade


Technical parameters of manual pencil hardness tester:
Measurement angle: 45 degrees
Measurement level: 13 grade (6B-6H) standard Zhonghua brand hardness test pencils (6B, 5B, 4B, 3B, 2B, B, HB, H, 2H, 3H, 4H, 5H, 6H).
Weight: Approximately 10KG
Load capacity: 500g/265G/235G (three weights)


Test program:
1. The pencil should be sharpened, and the graphite should protrude by about 5mm. Special pencil sharpeners included in the supply scope can be used to meet this requirement. Grasp the pencil vertically, with the graphite facing downwards against sandpaper (particle fineness 400), and grind the graphite core flat with sharp edges.
2. Insert the pencil into the instrument, protrude 5mm, and then place the instrument on the surface of the template. Grasp the handle with your thumb and index finger and slide it on the template at a speed of approximately 10cm/s.
3. Choosing a pencil with appropriate hardness requires experimentation. It is recommended to start with a medium soft pencil or a medium hard pencil, and gradually find the most suitable pencil.
During the testing process, be careful not to confuse the pencil marks and penetration marks. If necessary, use a damp sponge or a soft eraser to wipe off excess line marks.
The digits of two types of pencils are marked with pencil hardness. The hardness of a pencil, such as 2H-3H, means that a 2H pencil can leave word marks on the surface, while a 3H pencil can slightly scratch the paint film, resulting in a paint film hardness of 2H.