Shore Durometers

A Shore durometer is one of several measures of the hardness of a plastic, silicones, foams or rubber (but can also be applied to leather, gel or wax) – with the term the term durometer is often used to refer to the measurement as well as the measuring instrument itself. The basic test requires applying the force in a consistent manner, without shock, and measuring the hardness (depth of the indentation). The durometer scale was defined by Albert Ferdinand Shore, who lends his name to the measuring device. There are different Shore Hardness scales for measuring the hardness of different materials. These scales were invented so that people can discuss these materials and have a common point of reference. The Shore A00 Scale measures rubbers and gels that are very soft, the Shore A Hardness Scale measures the hardness of flexible mould rubbers that range in hardness from very soft and flexible, while the Shore D Hardness Scale measures the hardness of hard rubbers, semi-rigid plastics, and hard plastics. Shore durometers are used in fields engineering and metallurgy.

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