Pencil Coating Hardness Tester NOVOTEST TPK-1

The instrument tests the hardness of powder and liquid paint coatings using sharpened pencil leads at a 90° angle, starting with the softest leads and increasing hardness until damage appears; the hardest lead that leaves no marks indicates the coating’s hardness value (e.g., 3H, 2H, H, HB, B, 2B, etc.).

Reliability and durability of the design
Easy in operation
Competitive price
The instrument is designed to determine the hardness of coatings by pencil leads in compliance with: ASTM D 3363, ECCA T4, EN 13523-4, ISO 15184:2012, JIS K 5600-5-4.

Measurement range	9В – 9Н
Load	7,5N (750g) at 45°
Size of tested area	70*160
Sharpening angle of lead	90°
Dimensions	120x55x50 mm
Weight	1,8 kg

Instrument
Set of pencils 9В – 9Н (20pcs.) or others
Operating manual
Case

Application

The instrument is widely used for hardness testing of powder and liquid paint coatings. For high accuracy of the results, the lead of pencil should be sharpen under 90 ° angle. The tests begin with the softest pencil leads. If after applying there is no any signs of damage on the tested coating, user will have to repeat the test with one grade harder pencil leads. The MAX hardness value of pencil leads, that leaves no any traces of destruction on the coating, is hardness value of tested coating (for example: 3H, 2H, H, HB, B, 2B, etc.).

Design

The instrument is made of steel, has rectangular shape. There are two castors for movement on the surface of tested object. There is a port through the instrument and thumbscrew for fixation of the pencil at an angle of 45 ° to the tested surface. The design of the device provides a constant load 7,5N (750g) of the pencil lead on the tested coating.