The TQC Buchholz Hardness Indentation Test provides a method for carrying out an indentation test on coatings complying with the ISO 2815-2003 standard. The TQC Buchholz Hardness Indentation Test consists of a calibrated slip-on weight with a sharp-edged metal wheel, an illuminated microscope, a level gauge, a digital dual timer, and two markers with template.
Product Description
- Buchholz indenter is equipped with functional grips allowing gentle placing and lifting of the instrument
- Pins and cutting part of indenter are made of hardened steel preventing wear
- High quality microscope with precision glass optical lenses and strong illuminator allows a clear visibility of the, often hard to see, indentation mark
- Dual timer can be pre-set for both “in-position“ time and “recovering” time
- Separate level gauge allows checking the correct level of the test panel before the test is performed
Specification
- The test shall be carried out at a temperature of 23±2°C and a relative humidity of 50±5%.
- 1. Measure the coating thickness minimal 3-45 μm (according to the Buchholz Table)
- 2. The coating to be tested shall be smooth and clean.
- 3. Use the level gauge 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. Gentle 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 TQC Buchholz Indentation Tester from the surface and start T2 on the timer. While removing be careful for applying any pressure to the indenter.
- 8. After the recovery period of 35 seconds measure the length of the indentation (L) with the measuring microscope.
- 9. Look up the indentation length (L) in the Buchholz table and find the corresponding Buchholz Indentation resistance (BH) value, or use the formula BH = 100/L
