Pencil Hardness Tester with 500/750/1000g Load Weigh and 13 Pencils

Product Parameters Load Weight:500g /750g /1000g Measurement Angle:45°(Between Pencil and Measured Surface) Scratch Speed:About 1 mm/s Procedure 1. For wood pencils, remove approximately 3⁄16 to 1⁄4 in. (5 to 6 mm) of wood from the point of each pencil using a draftsman-type mechanical sharpener, being careful to leave an undisturbed, unmarked, smooth cylinder of lead. 2.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). 3.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 1⁄8 in.(3 mm) . 4.Continue the process until a pencil is found that will neither cut through nor scratch the surface of the film. Any defacement of the film other than a cut (gouge) is considered a scratch. Record each end point (if applicable) for gouge and scratch hardness. 5.Make a minimum of two determinations for gouge hardness (3) and scratch hardness (4) for each pencil or lead.

• The Coating hardness is a necessary indicator for quality certification in the coating manufacturing and coating application (coating table) industry. The pencil scratch method is a commonly used method for measuring the hardness of coatings.
• The pencil hardness tester is suitable for testing the hardness of coating. The instrument can be used in the laboratory or on construction sites, and can be used to identify the hardness of coating in any direction.
• The pencil hardness tester adopts mechanical measurement. Maintain a three point contact coating (two wheels, one pencil lead), with a 45 degree angle between the pencil and the test surface. Push the instrument to slide and use a pencil to draw the corresponding trajectory on the coating. The hardness value of the film can be determined in the variation of different pencil markings.
• Load Weight:500g /750g /1000g；Measurement Angle:45°(Between Pencil and Measured Surface)；Scratch Speed:About 1 mm/s；13 pencils:6B-HB-6H.
• The pencil hardness tester uses stainless steel material, which is durable and has a smooth surface.