determination of film hardness by pencil test(by hand)
Use a pencil with certain hardness No.(9H-H;B-6B;F;HB) to testing the coating hardness(on the surface plastic,wood of metal) Spec: Model:QHQ-A Weights of load:500g,750g,1000g DeterSend product request
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| determination of film hardness by pencil test(BY TESTING MACHINE) | Use a pencil with certain hardness No(9H-H;B-6B;F;HB)to testing the coating hardness(on the surface plastic,wood or metal). Spec: Model:QHQ-A Weigh... | |
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