The purpose of pencil scratch hardness tests is to determine the resistance of coating materials to scratch effects on surfaces.
In the wolff- wilbon test, pencils of various degrees of hardness are moved over the surface under a fixed pressure and angle to the surface. The degree of hardness of the pencil which damages the surface is taken as a measurement of scratch hardness e. g. “3H” hardness.
Instrument is supplied with set of hardness pencil, pencil sharpener, abrasive paper, operation manual, carrying case.
This test complies with ASTM D3363, is 101
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100 Per Day
Within a certain price range free samples are available