TONYHK TNJ-034 铅笔涂层硬度计 (1000+50g)

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



  • 质量承诺
  • 正品保修
  • 送货到家
  • 交易简单化