Grindstone

What to do if the cutting edge of the knife or tool is damaged or blunt?

You can easily remove minor injuries or chipping on the cutting edge with our
unique natural combination stone. The whetstone in our product is
a very homogeneous French sandstone from the Pyrenees. The grain size of the natural stone is 1000.
Used with water, the sandstone brings your knives or tools back to top basic sharpness.

We recommend a coarser grit for larger chipping or really blunt knives or tools.
The grit of the whetstones we offer ranges from 200 - 1000.

Definition of grit

The grit size indicates the fineness of an abrasive. In Europe, it is defined according to the number of meshes per square inch of a sieve. For example, an abrasive with a grit size of 500 will just pass through a sieve with 500 meshes per square inch. The grit size is also sometimes described by specifying the size of the abrasive particles in microns (= 1/1000 mm). Stones with a grain size of 80-220 are used for roughing (rough shaping, grinding out grooves or chipping), grain size 400-1000 for grinding.

Structure of a synthetic sharpening stone

Synthetic whetstones consist of a bonding agent (matrix).
The abrasive particles (aluminum oxide, carbides, natural semi-precious stones, diamond dust) are embedded in the matrix.
The hardness of the binder and the quality of the sharpening particles are decisive for the quality.
For the production of synthetic whetstones, clay-like materials are often used as binders.
The hardness of the stones is determined by the additives and the firing temperature.