Hardness can be defined as the resistance of a material to indentation. Hardness testing is an important step in many industries around the world, e.g. metals, fibreglass, plastics and rubber; it is often used to certify the quality of materials, test repairs and can indicate possible failure of coatings.

DeFelsko offers digital and analogue hardness testing in accordance with three different recognised hardness testing methods: Shore (A and D), Barcol and pencil hardness (Wolff-Wilborn).