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Paints and varnishes. Determination of film hardness by pencil test
Description
Paints and varnishes. Determination of film hardness by pencil test1 Scope This document specifies a method for determining the film hardness by pushing pencils of known hardness over the film. The test can be performed on a single coating of a paint, varnish or related product, or on the upper layer of a multi coat system. This rapid test has not been found to be useful in comparing the pencil hardness of different coatings. It is more useful in providing relative ratings for a series of coated panels exhibiting
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