Overview of Pencil Hardness Tester:

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
• All manual
• Low cost

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
• 14 pcs. Mitsubishi brand pencils, from 6H to 6B

Standards of the Pencil Hardness Tester:

• ASTM D3363 and ISO15184