DIN 1996-13 – tar hardness indentation test
DIN EN ISO 2039-1 – indentation test for hardness of plastic material
ASTM E 18 – metal hardness test
DIN EN 10109-1- rockwell hardness test for metals and plastics
DIN EN 13279-1 – construction gypsum hardness test
DIN EN 433 – resilient flooring
Hardness measurement of DIN 51917- rockwell carbon object
ASTM D 785 – hardness test for plastics
ASTM F 36-99 – oil seal hardness measurements