Use this simple tool to determine the hardness and scratch-resistance of a coating. A pencil of known hardness is held at a 45° angle and moved across a coated surface at 1mm/s while applying a known pressure (7.5N /1.68lbf / 750g). The resistance of a coating (also known as its pencil hardness) is indicated by the grade of the hardest pencil that does not permanently mark the coating. See the table below for a list of rankings of pencils by hardness.
Features of the Pencil Hardness Tester:
Easy to use
Specifications of the Pencil Hardness Tester:
The pressure of Pencil Tip 7.5N /1.68lbf / 750g
45° angle between pencil and surface to be tested
The tested surface is touched at three points 2 rollers, and pencil tip