Standard test for measuring the hardness of coatings. The set consists of a calibrated slip-on weight with a special cutter, an illuminated microscope, a level gage, a digital dual timer, two markers with template and three AAA batteries.

The calibrated slip-on weight with special cutter is positioned on the test specimen for a set period of time. The length of the indentation on the coating is an indication of the hardness of the surface. Mandatory test in Qualicoat, QIB and GSB accredited laboratories.

1. Measure the coating thickness minimal 3-45 μm (.039 - 1.77 mils) (according to the Buchholz
   Table)
   
2. The coating to be tested must be smooth and clean.
   
3. Use the level gage to ensure the test panel is at level on the testing surface.
   
4. Use the template to mark the spot to be measured and the feet positions on the test object. The
   indentation will be visible at the gap in the middle.
   
5. Check the indentation body (weight, wheel and fixing points) and make sure they are free from
   dust.
   
6. Gently, and without tilting or lateral movements, place the indentation body on the test panel, feet
   first, exactly on the marked positions, then lower the indenter carefully until it touches the panel and
   start T1 on the timer.
   
7. After 30 seconds remove the Buchholz Indentation Tester from the surface and start T2 on the timer.
   While removing be careful not to apply any pressure to the indenter.
   
8. After the recovery period of 35 seconds measure the length of the indentation (L) with the measur-
   ing microscope.
   
9. Look up the indentation length (L) in the Buchholz table and find the corresponding Buchholz

• The special cutter is a sharp object. Be careful when using it.
• Though robust in design, this instrument is precision-machined. Never drop it or knock it over.
• Always clean the instrument after use.
• Clean the instrument using a soft dry cloth. Never clean the instrument by any mechanical means
  such as a wire brush or abrasive paper. This may cause permanent damage.
• Always keep the instrument in its case when not in use.
• Annual calibration is recommended.