TONYHK TNJ-034 Pencil Coating Hardness Tester (1000+50g)
ManufacturerTONYHK(View more products from this manufacturer)
ModelTNJ-034
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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 3mm
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
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