MODERNER PPH-500 Pencil Hardness Tester Weight 500g

The pencil Hardness Tester is designed and manufactured according to the national standard GB/T6739-2006 "Determination of paint film hardness by pencil method of paint and varnish", which provides a fast and economical method to measure the scratch resistance (and other corresponding defects) of the paint film surface performance.

Structure and Principle:

Three points are used to contact the surface to be tested (two points are rollers, and one point is the pencil core). The angle between the pencil and the surface to be tested is 45°. When the horizontal bubble is horizontal, the pressure that the main body exerts on the pencil lead has three specifications: 500±10 grams , 750±10 grams, 1000±10 grams (as shown). Determination of paint film hardness by drawing a pencil of known hardness scale across the paint film

Experimental procedure

1. Prepare the substrate according to the provisions of GB/T9271 "Standard Test Panels for Paints and Varnishes".

2. Sharpen the pencil until the lead core is exposed by 5-6 mm (keep the lead cylindrical shape), and keep the pencil perpendicular to the sandpaper to grind the end face of the lead lead until the end face becomes a complete circle without broken or notched edges. Pencils are sharpened in this way before each use.

3. Unless otherwise agreed, measure at 23±2°C and 50±5% humidity.

4. Install the pencil according to the attached drawing, and push it at least 7mm at a speed of 0.5~1mm/s. The pencil hardness of the paint film is indicated by the marked hardness of the hardest pencil without scratches of 3mm or above on the paint film.

5. Measure twice in parallel. If the results of the second measurement are inconsistent (the difference exceeds 1 pencil hardness unit), the test should be repeated.

Hardness Tester x1, 13 advanced drawing pencils (6H~ 6B)

[Note] Because the manufacturer's packaging may be updated or upgraded, the detailed packaging list shall be subject to the latest standard configuration of the manufacturer.