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Overview of BYK pencil hardness tester products from Germany:

Purpose and application of pencil hardness tester:

Pencil scratches belong to a type of scratch hardness testing instrument. This is a simple and quick method to scratch the coating surface with sharp edges or other rough surfaces to test the hardness of the coating. It can also be used in the production process, such as coil coating.

Principle of pencil hardness tester testing:

Pencils of different hardness levels move on the surface of the paint film with a force of approximately 7.5 ± 0.1 N at a 45 degree angle to the horizontal. The hardness of a pencil is determined by two hardness levels, the softer one producing a writing mark, and the other hardness level producing a noticeable scratch on the coating.

Design and function of pencil hardness tester:

The pencil hardness tester ensures that the testing is technically compliant with the Wolff Wilborn standard, ensuring that the force and angle remain constant throughout the entire testing process. The instrument is easy to operate and eliminates the possibility of pencil pressure being influenced by human factors.

Pencil hardness tester testing program:

Grind out the pencil lead with a protrusion of about 5mm, hold the pencil vertically, and grind the graphite core flat and sharp with the graphite facing downwards against sandpaper (particle fineness 400).

Insert the pencil into the instrument, protrude 5mm, and then place the instrument on the surface of the template. Grasp the wheel axle with your thumb and index finger, and push the instrument on the template at a speed of approximately 10 cm/s. Choosing a pencil with appropriate hardness requires experimentation. It is recommended to start with a medium soft pencil or a medium hard pencil, and gradually find a suitable pencil.

During the testing process, be careful not to confuse the pencil marks and penetration marks. If necessary, use a damp sponge or a soft eraser to wipe off excess line marks.

The numbers of two types of pencils are marked with pencil hardness. The hardness of a pencil, such as 2H... 3H, means that a 2H pencil can leave marks on the surface while a 3H pencil can slightly scratch the paint film. It is not recommended to use this testing method for paints with high pigment content or paints containing flake pigments.

Wuhan Kesaisi Electromechanical Co., Ltd. is a specialized company that sells, consults, and provides after-sales maintenance services for industrial testing, optical testing, environmental testing, non-destructive testing, material testing, water quality analysis, gas testing, general analysis, life sciences, basic measuring tools, testing machines, and other instruments and equipment; We are currently a sales and service provider of ultra precision instruments for geometric measurement and geometric tolerance in China.

Wuhan Kesaisi Electromechanical Co., Ltd

Contact: Yang Chaoyang