The Barcol hardness test characterizes the indentation hardness of materials through the depth of penetration of an indentor, loaded on a material sample and compared to the penetration in a reference material. The method is most often used for composite materials such as reinforced thermosetting resins or to determine how much a resin or plastic has cured. The test complements the measurement of glass transition temperature, as an indirect measure of the degree of cure of a composite. It is inexpensive and quick, and provides information on the cure throughout a part.The Barcol Tester is a small portable Hardness Tester having a weight around 1 Kg.It is suitable for testing hardness of aluminium, aluminium alloys, copper, brass, plastics, fiber glass and other soft materials having hardness from 25 to 150 BHN (10 mm ball / 500 kg load).No experience required; can be used in any position and in any space that will allow for the operator's hand. The hardness reading is instantly indicated on the dial, which is divided into one hundred graduations. No waiting, pre-loading or separate measurements.