Buchholz hardness tester finds application in measurement of hardness on coatings, lacquers & vanishes.sle buchholz hardness tester is a multi-purpose tester designed to comply din, iso and nft standards. The hardness tester allows the user to find out the real penetration depth and the elasticity of the varnishes and coatings. the harness tester is supplied with dial gauge to read the result in m .it is an easy, reliable & accurate tool for measuring the harness value of coatings.