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Pencil hardness tester，hardness tester，b-3084
This instrument offers an easy to use method for the determination of film hardness for a coating applied to a flat substrate.The pencil lead,prepared beforehand by rubbing it on fine abrasive paper(400),is maintained at an angle of 45 and pushed with uniform pressure onto the sample.leaving either a superficial trace or causing destruction down to the substrate. It complies with the requirements of ASTM D 3363, GB/T 6739. Main Technical Parameters Three points are touched on the tested surface roller pencil lead
The angle between pencil and the tested surface 45
Pressure of pencil lead 1. 765 10g
Packing List: Pencil Tester, Body 1 Set of Pencils (14pcs) : -6B-5B-4B-3B-2B-B-HB-F-H-2H-3H-4H-5H-6H. MITSU-BISHI PENCILS Rubber
