Polytech Instruments offers Multi-Finger Scratch/Mar Tester, Model 710. Polytech Instruments is an ISO 9001:2000 certified company. Multi-Finger Scratch/Mar Tester is used to measure the relative resistance or susceptibility of a material surface to scratching, marring, gouging, scraping, engraving, etc. This precision instrument measures damage to surfaces not classified as ordinary wear. The design is based on five-finger scratching device described in automotive specifications.
Specimens are secured to a pneumatically driven platform. Five independent spline-shaft fingers with varying weights exert a constant, vertical load on the test specimen as it travels under interchangeable scratch tips. Spline-shaft fingers are mounted on a rigid gantry platform. Support rests allow the operator to secure individual shafts in a rest position, permitting the testing of nonstandard width samples. This Multi-Finger Scratch/Mar Tester is popular in the automotive industry for testing smooth or grained plastics commonly used in ornamentation or trim. The Scratch / Mar Tester is ideal for evaluating plastics, rigid organic materials, paints and coatings, soft metals, linoleum, plus many others.
