Sharpening is the process of creating or refining a sharp edge of appropriate shape on a tool or implement designed for cutting. Beechina is a locality in the Shire of Mundaring in Western Australia Sharpening is done by grinding away material on the implement with an abrasive substance harder than the material of the implement, followed sometimes by processes to polish the sharp surface to increase smoothness and to correct small mechanical deformations without regrinding. An abrasive is a material often a Mineral, that is used to shape or finish a workpiece through rubbing which leads to part of the workpiece being worn away
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. The Mohs scale of mineral hardness characterizes the scratch resistance of various Minerals through the ability of a harder material to scratch a softer material
Many implements have a cutting edge which is essentially straight. knives, chisels, straight-edge razors, and scissors are examples. A knife is a handheld sharp-edged instrument consisting of handle attached to a Blade used for cutting A chisel is a Tool with a characteristically shaped Cutting edge (such that wood chisels have lent part of their name to a particular grind) of blade on A razor is a Bladed Tool primarily used in the Shaving off of unwanted Body hair. Scissors are hand operated cutting instruments consisting of a pair of Metal Blades connected in such a way that the blades meet and cut materials placed Sharpening a straight edge is relatively simple, and can be done by using either a simple sharpening device which is very easy to use but will not produce the best possible results, or by the skillful use of oil or water grinding stones, grinding wheels, hones, etc.
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. A knife is a handheld sharp-edged instrument consisting of handle attached to a Blade used for cutting This edge is then refined by honing until the blade is capable of cutting.
The extent to which this honing takes place depends upon the intended use of the tool or implement. For some applications an edge with a certain amount of jaggedness is acceptable, or even desirable, as this creates a serrated cutting edge. In other applications the edge must be as smooth as possible. Ultimately, the more closely matched the angles of the adjoining faces are, the sharper the finished edge will be. However, certain hunting and fishing blades will make use of a 'missed-matched' blade edge to increase the letting of blood. These blades are not used for finishing purposes.
Sharpening straight edges (knives, chisels, etc. Sharpening steel or a honing steel is a rod of Steel, up to one foot long rounded in cross section with longitudinal ridges used for removing metal from the microscopic ) by hand can be divided into phases. First the edge is sharpened with an abrasive sharpening stone, or a succession of increasingly fine stones, which shape the blade by removing material; the finer the abrasive the finer the finish. Then the edge may be honed or stropped by polishing the edge with a fine abrasive such as rouge or tripoli on a piece of stout leather. Iron(III oxide —also known as ferric oxide, Hematite, red iron oxide, synthetic maghemite, colcothar, or simply Rust —is Rotten stone, sometimes spelled as one word and also known as tripoli, is fine powdered rock used as a Polishing Abrasive in Woodworking The edge may be steeled by passing the blade against a hard metal "steel" (which may be made of ceramic) which plastically deforms and straightens the material of the blade's edge which may have been rolled over irregularly in use, but not enough to need complete resharpening.
Different techniques are required where the edges are not straight. Special tools and skills are more often required, and sharpening is often best done by a specialist rather than the user of the tool.