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    Senior Member blabbermouth JimmyHAD's Avatar
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    Default Flattening Water Stones With A DMT (Dia-Sharp FAQ)

    This is from the DMT (Dia-Sharp F.A.Q.)

    Note the bold text at the bottom of the page .....


    • Which product is the best to use to flatten my Japanese water stones?

      DMT has engineered a product designed specifically for this purpose; the DMT Dia-FlatŪ Lapping Plate. Available in 2 grit sizes: 95 micron (160 mesh) for finer grit stones or 120 micron (120 mesh) for 1000 grit and coarser stones.
      Both are designed to quickly flatten waterstones or any other type of sharpening stone. The Dia-FlatŪ is able withstand the extreme service conditions incurred when flattening other abrasive sharpening stones due to the proprietary DMTŪ Diamond Hardcoat™ process.
      Use under running water or submersed in a pan of water for best results in order to quickly flush away the slurry that is generated when flattening. Abrade the surface to be flattened across the Dia-FlatŪ surface using long overlapping strokes in a figure “8” motion and light to moderate force – be sure to use the entire Dia-FlatŪ surface. A figure “8” motion promotes even, consistent wear of the stone being flattened and the Dia-FlatŪ Lapping Plate. The figure “8” motion and finishing with lighter pressure will reduce any scratches from the flattening process. (For complete instructions refer to below link.)
      IMPORTANT: Do not use in a sink that has a garbage disposal unit as the slurry is detrimental to the disposal bearings.
      Always clean/dry your DMT Dia-FlatŪ after each use as build up of material on the stone from flattening may be significant.

      Some DMT Diamond Sharpeners could be used (and have been used) for flattening, however, they were designed for sharpening, not flattening, therefore, DMT assumes no liability for sharpening stones worn out due to this method of use.

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