Durometer Be Sure You Get The Correct Hardness
Throughout Industry, the hardness of Polymer & Plastics is most commonly measured by the Shore® (Durometer) test. Shore® hardness is the preferred method for testing rubbers, elastomers, and softer plastics, although there are several different scales of hardness for different product types. The Shore® hardness is measured with a Durometer, and is sometimes referred to as 'Durometer hardness'.
The hardness value is determined by the penetration of the Durometer into the sample. Because of the resilience of rubbers and plastics, the indentation reading my change over time - so the indentation time is sometimes reported along with the hardness number. The ASTM test method designation is ASTM D2240 and is generally used in North America. Related methods include ISO 7619 and ISO 868; DIN 53505; and JIS K 6253.
The results obtained from this test are a useful measure of relative resistance to indentation of various grades of polymers. However, the Shore® Durometer hardness test does not serve well as a predictor of other properties such as strength or resistance to scratches, abrasion, or wear, and should not be used alone for product design specifications. Shore® hardness is often used as a proxy for flexibility (modulus) for the specification of elastomers.