Scratch Hardness Testing

Gashes and mars are not nice to look at, especially not on smooth, shiny paint surfaces. But they can occur quite quickly: fingernails can unintentionally scratch over a matt-polished table. Or, a branch can grind across the beautiful paint of a Cadillac. The mar is often from a small cause but can leave a big mess! Metal marking is another type of mar. Here, the culprits are small metal particles of coins or similar which “rub off”, thereby leaving ugly scratches on the surface. Previously you could “inspect” a surface only with your fingernails. Now for the first time, the Model 435 Mar tester enables you to specifically define the behaviour of coating surfaces with an exact test value.