Whetstone general there are six: green silicon carbide, white fused alumina and corundum, boron carbide, ruby ​​(aka sintered corundum) and natural jade.

      Boron carbide Whetstone: size between 400-1000, the rougher the smaller the particle size, the greater the amount of grinding, grinding tools for semi-finished, and its own hardness, especially wear-resistant, scratch out the natural jade Whetstone easy Whetstone: Whetstone granularity is the finest kind, only for polishing, almost no amount of grinding; painted W0.5 diamond polishing paste on a whetstone, the knife can be ground into a mirror surface

Ruby Whetstone: between effect between boron carbide and natural jade, particle size between 1000-2000, mainly used for the blade, sharp edge, plus W0.5 diamond polishing paste can achieve a mirror

      Further, diamond paste, particle size from W40 to W0.5, W40 most coarse grinding large, W0.50 finest for polishing, but not annealing, hard knife can grind to use: Put W40 coarse abrasive paste was applied on boron carbide Whetstone, can speed up the increase grinding capacity, not annealed. Then, to coarse grinding paste on the knife cleaned, re-use W0.5 abrasive paste, coated again ruby or natural jade, for polishing, the mirror effect is thrown up.

     Green silicon carbide, white corundum, and corundum Whetstone hardness is not enough these three, plus a little coarse granularity, easy to grind knife draw a cross, and the other three stone polishing, grinding will not anneal. Size there is nothing greater than 1000 difference, mainly on the use of the abrasive paste, the coated abrasive W1.5 high on purpose and then 1000 ruby, grinding its high grinding effect is W1.5 effect that 2500 grit Whetstone effect.

     Abrasive paste type and size correspond to the following: W5--1200 Head W3.5--1500 Head W2.5--2000 W1.5--2500 Head Head Head W0.5-- W1--8000 finest national standards not identify the specific value and boron carbide, ruby, jade is the natural right of three materials, different materials, the effect is the discrepancy: boron carbide - the main grinding Ruby - mainly the blade, with fine-grained grinding paste, also It can be polished, the mirror natural jade - just polishing