According to GB/T 6739-2006, ASTM D 3363 design, through to a certain hardness grade pencil scratch after dry film, with no coating damage caused by the hard pencil to express. The instrument has small volume, light weight, simple and scientific operation etc It can be used in the laboratory, also can be used in the construction site, and can be in any direction on the coating hardness test. Coating hardness is the necessary measurement for the performance of coatings. This instrument applied the pencil scratch method. It is a fast and economical way to determine the film hardness using the drawing lead core or the pencil core. The pencil scratch method for coating hardness testing is a common method in the world since the 1980s. In China, this test method has also been promoted to the coating research and industrial production. The instrument can be used both in laboratory, and on site. Pencil leads to coating stress 1000g/750g/500g(three types) Pencil bear load accuracy ±10g Pencil and measured surface angle 45 º Three contact the surface to be tested(roller, pencil lead) Standard configuration One pencil hardness tester; a heel block, Chunghwa pencil (6B -6H a total of 13, also optional Mitsubishi pencil); a knife; a level bubble, ten pieces of No.400 water sandpaper. Scratch speed 1mm/s 500g pencil hardness tester 750g pencil hardness tester 1000g pencil hardness tester
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