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
