Stainless Steel Pencil Mechanical Electric Deformation Test Hardness Tester
1. Place the instrument flat on the test piece (if the test piece is smaller than the instrument,

place the test piece in front of the instrument and place the gasket under the front of the

instrument in order to keep the instrument horizontal).

2. Use a razor blade to make the protruding part of the stylus pen about 2-5mm and grind it

on the sandpaper, then insert the pencil into the instrument so that the stylus pen can be

fixed and locked after being in contact with the test piece (Recommended: Select a plane

in the shape of a rectangle and fix it. After the test, rotate the two planes and then fix the

test. Then, rotate the two plane fixing test to use three circles on one surface.) When

removing the washer, remove the spacer.

3. With thumb and middle finger caught in the center of two wheels. Push the instrument

about 1-2cm backward to remove the instrument (do not apply any pressure when pushing

the instrument).

4.Judgment of hardness, to see whether the scratch scratch film. Proposed to do at least

three test strips above the location, take the average. Hardness of the series, the standard

pencil from soft to hard 6B 5B 4B 3B 2B HB H 2H 3H 4H 5H 6H (a total of 13).