| Hoffman Scratch Hardness Tester | BYK-Gardner USA | The Hoffman Scratch Hardess Tester was developed for the comparative evaluation of scratch resistance and adhesion of many types of coatings. This instrument consists of a four-wheeled carriage, a scale arm graduated from 0-20 that is attached permanentl...展开 The Hoffman Scratch Hardess Tester was developed for the comparative evaluation of scratch resistance and adhesion of many types of coatings. This instrument consists of a four-wheeled carriage, a scale arm graduated from 0-20 that is attached permanently to the carriage in a counterpoised condition about the pivot axis, and a scratch tool with a sharp circular rim mounted at 45° to the flat test surface. 收起 |  |
| Pencil Hardness Tester | BYK-Gardner USA | Pencil Hardness Tester is used to determine the resistance of coating materials or lacquers to scratch effects on the surface. This test is of particular value for furniture or vehicle lacquers, but is also a useful aid in the development of synthetic ...展开 Pencil Hardness Tester is used to determine the resistance of coating materials or lacquers to scratch effects on the surface. This test is of particular value for furniture or vehicle lacquers, but is also a useful aid in the development of synthetic resins or other film forming materials. Generally, scratch hardness is measured by moving a sharp object under a known pressure over the test surface. The result may either be the value of the pressure required to scratch through the test material if a scratching tool of constant hardness is used, or the hardness of the scratching tool is varied while constant pressure is applied. 收起 |  |
| Balanced Beam Scrape Adhesion And Mar Tester | BYK-Gardner USA | Balanced Beam Scrape Adhesion And Mar Tester is used to perform scrape adhesion and mar resistance (scratch hardness) tests of coatings and surfaces of various materials. |  |
