500g 750g 1000g Pencil Hardness Tester Paint Coating Film Scratch Tester Product Description 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. Measurement Principle The Pencil Hardness Tester applies mechanical measurement. Keep three point touch the coating (two wheel, a pencil core), and a 45 degree angle between pencil and test surface. Push the instrument sliding, pencil draws the corresponding track in the coating. In the change of different pencil marks, the hardness value of the film can be determined. Product Parameters Load Weight:1000g /750g /500g Measurement Angle:45°(Between Pencil and Measured Surface) Three Touch Points:Two Wheels, A Pencil Core Scratch Speed:About 1 mm/s Standard Configuration Pencil Hardness Tester 1000g Weight 750g Weight Pencils (6B-6H) Eraser Knife Horizontal Pad Block Sandpaper