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2. Knife sharpening - Wikipedia

   en.wikipedia.org/wiki/Knife_sharpening

   Knife sharpener in Kabul, Afghanistan (1961) The Knife Grinder by Massimiliano Soldani (c.1700), Albertinum, Dresden A railway camp cook sharpens a knife blade on a stone wheel, 1927. Knife sharpening is the process of making a knife or similar tool sharp by grinding against a hard, rough surface, typically a stone, [1] or a flexible surface ...

3. Kabutowari - Wikipedia

   en.wikipedia.org/wiki/Kabutowari

   The blade of this type of kabutowari was a curved tapered square [4] iron or steel bar with a hook on its back edge. [5] In combat, one could parry and catch a blade with that hook, as with a jitte. Some kabutowari of this type were mounted in the style of a tantō with a koshirae. [3]

4. Scraper (archaeology) - Wikipedia

   en.wikipedia.org/wiki/Scraper_(archaeology)

   This scraper type is common at Paleo-Indian sites in North America. Scrapers are one of the most varied lithic tools found at archaeological sites. Due to the vast array of scrapers there are many typologies that scrapers can fall under, including tool size, tool shape, tool base, the number of working edges, edge angle, edge shape, and many more.

5. Sharpening stone - Wikipedia

   en.wikipedia.org/wiki/Sharpening_stone

   The term is based on the word "whet", which means to sharpen a blade, [3] [4] not on the word "wet". The verb nowadays to describe the process of using a sharpening stone for a knife is simply to sharpen, but the older term to whet is still sometimes used, though so rare in this sense that it is no longer mentioned in, for example, the Oxford Living Dictionaries.

6. Sharpening - Wikipedia

   en.wikipedia.org/wiki/Sharpening

   Sharpening these implements can be expressed as the creation of two intersecting planes which produce an edge that is sharp enough to cut through the target material. For example, the blade of a steel knife is ground to a bevel so that the two sides of the blade meet. This edge is then refined by honing until the blade is capable of cutting.

7. List of blade materials - Wikipedia

   en.wikipedia.org/wiki/List_of_blade_materials

   S1, a medium-carbon shock-resisting steel tool steel which combines moderate hardness with good impact toughness. Carbon content 0.40 - 0.55%. [11] W1, a water hardening tool steel. High carbon content. W2, a tool steel that holds its edge quite well but is not very tough.