Presto Stantest Private Limited supplies Scratch Hardness Tester. Presto Stantest Private Limited is an ISO 9001:2000 certified company that manufactures products for industrial measuring applications. The Scratch Hardness Tester is used to test resistance to scratch under a specified load. This is applicable in testing varnishes, paints, and lacquers and similar products. It also suits application in small laboratories and industries where repetitive quality control tests are required.