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Poltava Diamond Tools of Ukraine makes some of the highest quality sharpening stones currently available. They specialize in resin and metallic bonded abrasives using both diamond and CBN. We have sourced a range of specially selected resin and metallic boded diamond stones from Poltava. In this 6"x1" size we have 4 grits to choose from; when combined these 4 grits should make a complete progression from initial bevel setting to final polishing.
We have two binder types available: metallic and resin. The metallic is only available on the two coarser grits. This binder is incredibly tough and hard wearing. It will need very minimal flattening, will not gauge, cut quickly, and should last an incredibly long time. This binder is ideally for lower grits stones because it is incredibly tough and hard-wearing.
Resin bonded is only available in the two finer grits. This binder is not quite as tough and hard-wearing as the metallic, but it should leave a nicer finish with the higher grits. These stones will still be very tough and will not need to be flattened often, but not quite on the level of the metallic.
The abrasive layer of these stones is mounted on a color coordinated aluminum blank with all the information about the stone laser engraved on the back.
100/80 micron metallic bonded diamond. This is a coarse stone for the initial stage of sharpening, roughly equivalent to 225 grit. The metallic bonded stone will be incredibly tough and hard wearing.
40/28 metallic bonded diamond. This is a medium-coarse grit stone, great for transitioning from your coarse starting stone to move up a progression towards a polish. Could be used to create a very coarse edge
20/14 micron resin bonded diamond. This is medium grit stone, approximately 1100 grit. The scratch pattern is a very nice 1k, defined scratch pattern but still cuts smoothly. Easy to finish and deburr with, this makes a great all around user edge; or sets you up to transition to your polishing stone(s).
5/3 micron resin bonded diamond. This is getting into your polishing territory at approximately 4000 grit. This should leave a minimal scratch pattern that is becoming a polish, and with some stropping afterwards should get you a nice polished edge.
Recommended care
If the surface starts to wear and get loaded with metal after a few uses, you can condition with a coarse to medium grit synthetic nagura stone, or sturdy brush with soap and water. If the stones start to wear after continued use and are no longer flat, use loose silicone carbide powder on float glass to flatten and recondition the surface. Recommended to use 80 grit to flatten, then condition if needed with 120 and/or 320 grit.
