Research Area

Surface Technology

Scratch Hardness Tester

Example of use:

  • Testing the scratch resistance and hardness of coatings (lacquers, paints) on test plates (metal, glass, wood, plastics)



Device configuration:

  • Scratch exposure of coatings by moving a weight beam with carbide tip loaded with a defined force over the sample at constant speed by motor operation
  • Score hardness corresponds to the force required to completely score the coating
  • Weight bar, marked from 0 to 1500 g, with movable weight for adjusting the stress
  • 4 additional weights of 1 kg each
  • Scribing needle with ball point made of tungsten carbide with Æ 1 mm, scribing knife according to Clemens with tungsten carbide cutting edge, pen with rubber coating

Overview of the Devices


Coesfeld Materialtest


Scratch Hardness Tester RH3


Dr. Tina Toelke

Surface Technology
Team Leader
Chemical Technologies

Phone: +49 3641 282554