The surface of pencil coating which do act on another harder object, the resistance performance of coating is the deformation esistance ability of coating.

Using a pencil mark to express.

It is suitable for coating hardness testing.

Specifications:

Tester:ensure that the weight of weigh 1000 + 50 g

Fix the pencil at 45° 

Move the testing platform under specified speed so as to touch the refill

A set of zhonghua senior drawing pencil 6H - 6B

Pare off wooden pencil preparation: lead with 3 mm

Circle on the sandpaper, grinding pencil tip into plane and make the sharp edges

Testing must be in temperature  23±2℃, relative humidity 50±5%.

Standards:GB/T 6739-1996