The standard defines hardness not just as "resistance to indentation," but specifically by the relationship between the indentation depth and the force applied.
The standard classifies rubber materials primarily by their physical properties and resistance to environmental factors like oil and heat: jis k 6380 pdf
Official copies of the JIS K 6380 standard are generally protected by copyright and must be purchased through authorized distributors: Japanese Standards Association (JSA): The official publisher of JIS standards. Intertek Inform: Provides the JIS K 6380:2014 1999 version in electronic format. GlobalSpec: Offers access to the standard classification of physical properties The standard defines hardness not just as "resistance
Industries that rely on the specifications within the include: GlobalSpec: Offers access to the standard classification of
: Commonly used by engineering firms for standards subscriptions. Comparison with ASTM D2000 If you are familiar with ASTM D2000