... indentation hardness tester.Barcol Impressor is mainly applied to test aluminum and alloys Introduction A portable indentation hardness tester ... extrusions, sheet and tubings. Barcol Impressor is suitable to test pure aluminum, soft aluminum alloys, super thick aluminum alloys ... Barcol Impressor) The improved models of Barcol Impressor are available to test softer plastics, very soft metals, rubber and ...