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The Japanese traditionally use natural sharpening stones (referred to as tennen toishi [15]) wetted with water, as using oil on such a stone reduces its effectiveness. The geology of Japan provided a type of stone which consists of fine silicate particles in a clay matrix, somewhat softer than novaculite . [ 16 ]
Knife sharpening proceeds in several stages, in order from coarsest (most destructive) to finest (most delicate). These may be referred to either by the effect or by the tool. Naming by effect, the stages are: sharpening: removing metal to form a new edge rough sharpening (using either water stones, oil stones, or medium grits of sandpaper)
There are many different kinds of honing oils to suit different needs. It is important to use the appropriate solution for the job. In the case of knife sharpening, motor oil is too thick or heavy and can over-lubricate or clog a sharpening stone, whereas WD-40 is too light an oil and will not carry the metal filings plus stone dust (collectively known as swarf) away from the stone, and clog it.
The substance on the sharpening surface must be harder (hardness is measured on the Mohs scale) than the material being sharpened; diamond is extremely hard, making diamond dust very effective for sharpening, though expensive; less costly, but less hard, abrasives are available, such as synthetic and natural Japanese water-stones. Several ...
Water is just another type of lubricant but requires the stone to be held in a special made water trough as a reservoir. Geoff 15:46, 25 September 2009 (UTC) There seems to be both conflicting and missing info on water vs. oil at large. For example one supplier's FAQ said that one of their synthetic water stones and a synthetic oil stone both ...
Honyaki (本焼) (literally true-fired) is the name for the Japanese traditional method of metalwork construction most often seen in kitchen knives (but also other tools) by forging a blade, with a technique most similar to the tradition of nihonto, from a single piece of high-carbon steel covered with clay to yield upon quench a soft, resilient spine, a hamon (or temper line), and a hard ...
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