Hardness Pen KT-267

Hardness Pen KT-267

Hardness Pen is a pocket instrument for testing the hardness and wear/scratch resistance of materials such

as coatings, lacquers, plastics or related products. A tungsten carbide tip is drawn over the surface with a

defined constant pressure. The pressure on the tip can be changed using the slide or by changing the spring.

A visual mark on the surface after use of the Hardness Pen indicates a fail of the surface hardness or wear/scratch

resistance. Can be used on flat and curved surfaces.

The handling of the Hardness Test Pencil is extremely simple. The estimated or known spring tension is set with the

help of the slider. Holding the instrument upright and placing its point on the test surface one draws a 5 to 10 mm long

line at a rate of approximately 10 mm/sec. The stylus should produce a scratch which is just visible with the naked eye.

If the spring pressure is too high, the scratch is clearly visible; if too low, no scratch appears. The applied pressure, fixed

by locking the slider, is marked in Newton’s.

        Three scales are engraved into the test pencil for the four pressure ranges:

                                                      No.1：0 - 3 N (blue marked)

                                                      No.2：0 - 10 N (red marked)

                                                      No.3：0 - 20 N (yellow marked).

                                                      No.4：0 - 40 N (White marked).