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 ranking of pencils by hardness.
Features of the Pencil Hardness Tester:
- Easy to use
- All manual
- Low cost
Specifications of the Pencil Hardness Tester:
- Pressure of Pencil Tip 7.5N /1.68lbf / 750g
- 45° angle between pencil and surface to be tested
- Tested surface is touched at three points –2 rollers, and pencil tip
- 14 pcs. Mitsubishi brand pencils, from 6H to 6B
| Model No. | Pressure |
|---|
| CA-22110 |
5 N / 1.1 lbf / 500g |
| CA-22120 |
7.5N /1.68lbf / 750g (most popular) |
| CA-22130 |
10 N / 2.2 lbf/ 1000g |
Standards of the Pencil Hardness Tester:
