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Flattening and Lapping Kit



Silicon Carbide is a perfect tool for flattening and lapping synthetic and natural stones. Flattening & Lapping Kit includes 4 bottles of Silicon Carbide powder (F 60, F 120, F 220 and F 400 grit) and glass 8"x8".


  • Components: F 60, F 120, F 220 (big bottles), F 400 (small bottle) and mirror
  • Shipping weight: 4.1 lbs (1.86 kg)
  • Net weight (+/- 5 g):
    F60 - 415 g
    F120 - 395 g
    F220 - 370 g
    F400 - 160 g
  • Materials: Silicon Carbide, Glass

How to use

  • F 60 SiC powder. Use this very coarse SiC to flatten stones up to F 150 grit.
  • F 120 SiC powder. Use this coarse SiC to flatten stones above F 180 grit.
  • F 220 SiC powder. Use it as second stage to lap stones of grit between F 280 and F 400.
  • F 400 SiC powder. Use it as second stage to lap stones of grit F 600 and above, as well as natural stones and fine ceramic stones which don't have grit value.

The SiC powder should always be coarsier than a sharpening stone.

Take slate pencil and put crosshatch pattern to the surface of the stone. Never skip this step. Your goal is to get rid of crosshatch completely. If you notice left-over of pattern somewhere, it means geometry is not flat yet.

Always add water to make suspension, not dry SiC. Try to use glass area evenly. Your glass will wear over time, because SiC affect glass too.

For hard stones, coarse SiC will be the major time consumer. When SiC disintegrates, put another pinch (refresh). If there is too much suspension, clean your glass. Use straight edge or metal ruler to check flatness. If you are not sure, make crosshatch pattern again.

The abrasive hygiene should be a priority. Don't let single coarse particle to remain in fine lapping.