Measuring hardness with Durometer
1. In case of measuring by pushing by hand, putting pressurized surface of durometer held by hand from the top vertically with a certain speed to the flat face of work piece which is put on the flat face . Then, after adhering it, regard the value measured within the passed time prescribed by standard as “hardness”.
2. In case of measuring hardness by mounting durometer to stand, measuring speed (not more than 3.2mm/sec.), pressurized load (type A, E is 1kgf, type D is 5kgf) and pressurized surface diameter (φ18mm) of type A / D durometers including tolerance are standardized.
3. Measuring point of test piece is to be inside from its edge by 12mm or more and clearance is to be 6mm and more. Thickness is normally 6mm and more, and 10mm and more for type E.
4. Test environment : Temperature is 23℃±2, humidity is 50±5% and median or average is applied for measured value. If 50 show in type A case, it is described［A50］. These are ruled for each standard.
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