Hardness Test Pencil

The BGD 511 Hardness Test Pencil is designed to simply and quickly test the resistance of a coating to scratches (such as writing marks or metal marking) using a usually hand-held, loaded stylus

The test can be performed by Method A (BGD 511-1), using a pointed stylus (diameter 0.50 mm, 0.75 mm, or 1.00 mm), or by Method B (BGD 511-2), using a disc stylus (made of stainless steel, copper, thermoset, or PMMA [Polymethyl methacrylate]). The stylus, loaded with a test force between 0.5 N and 20 N, is manually moved over the coating’s surface. The resulting damage is then visually examined and assessed, often with a magnifier