The purpose of this standard is to determine the penetration hardness of vulcanized elastomers using a type A or type D shore durometer. Type A is used for softer materials, type D for materials harder (see note in § 7.3).
NBN T 31-002-1976 history
1976NBN T 31-002-1976 Vulcanized rubbers - indentation hardness by means of a Shore duro-meter