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Buchholz Hardness Tester
Buchholz Hardness Tester
Buchholz hardness tester is used to evaluate hardness of mono or multicoat paints. A beveled disc with a sharp edge is applied onto the test surface under a constant 500g. Test load provided by a steel block holder. The trace left after 30 s. Load is measured with a 20X magnification illuminated microscope. The length of the indentation is inversely proportional to the hardness. This instruments is complies with standards as : BS EN ISO 2815, ECCA T12