NOTE In conducting the test, if the sharp edge of the lead is slightly chipped or crumbled, the lead must be resharpened. Place the coated panel on a level, firm, horizontal surface. Starting with the hardest lead, hold the pencil or lead holder firmly with the lead against the film at a 45° angle (point away from the operator) and push away from the operator. Exert sufficient uniform pressure downward and forward either to cut or scratch the film or to crumble the edge of the lead. It is suggested that the length of the stroke be 1 ⁄ 4 in. (6.5 mm). Repeat the process down the hardness scale until a pencil is found that will not cut through the film to the substrate(either metal or a previous coat) for a distance of at least 1 ⁄ 4 in. (6.5 mm) . 3-PIN-1 Pencil Hardness Tester ASTM D3363 500/750/1000g Weights with 13 Pencils Pencil Hardness Tester ASTM D3363 With 1Set of STAEDTLER Pencils Hardness Tester Pen Scratch Tester Scratch Test Pen Newton Pen 3PCS Blades Hot Cross Hatch Cutter Adhesion Tester Kit tinplate Paint base material Wet film test Spraying test base ASTM A623M Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 4.4 out of 5 stars 5 4.0 out of 5 stars 2 — 4.7 out of 5 stars 21 5.0 out of 5 stars 1 Price $124.99$124.99 $134.99$134.99 $799.00$799.00 $39.99$39.99 $88.00$88.00 application Pencil Hardness Test Pencil Hardness Test Hardness Test / Scratch Test Adhesion Test Wet film test Hardness Test Pencil brand China-ZHONGHUA Germany-STAEDTLER / / / package plastic box Aluminum box plastic box plastic box /