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Knife sharpening is the process of making a knife or similar tool sharp by grinding against a hard, rough surface, typically a stone, or a flexible surface with hard particles, such as sandpaper. Additionally, a leather razor strop, or strop, is often used to straighten and polish an edge. At the other extreme, an axe for chopping wood will be less sharp still, and is primarily used to split wood by chopping, not by slicing, and may be reground but will not be sharpened daily. In general, but not always, the harder the material to be cut, the higher (duller) the angle of the edge. It can also be divided into diamond knife sharpener, ceramic knife sharpener and carbide knife sharpener according to the material.
Manual knife sharpeners that are considered to be countertop utensils are also available that are more detailed than the Sharpening Steels. Tools that are built with grinding devices built into plastic or metal cases are often small in size but able to simplify the sharpening activities considerably. Often, the Knife Sharpener will contain a diamond coated abrasive or a tungsten carbide grinding stone for sharpening. A knife is drawn light through the grinding stone at an angle that is preset with the use of guides that keep the knife angle fairly consistent as it is drawn across the sharpening stone. Four to six draws of the blade is usually sufficient to keep the blade well honed. A guard is commonly attached to the sharpener so hands are kept safetly away from the knife blades.
Electric knife sharpeners are another alternative for shapening knifes and are a type of utensil that often simplifies the sharpening process, particularly if the knives are being used frequently for various food cutting activities.
And there are also scissor knife sharpener and pocket knife sharpener. The pocket knife sharpener is a compact, packable knife sharpener designed for sharpening on the go. The diamond sharpening plate and ceramic honing rod use built-in angle guides to create a sharp edge anytime, anywhere.
A honing steel, sometimes referred to as sharpening steel, whet steel, sharpening stick, sharpening rod, butcher's steel, and chef's steel, is a steel rod, ceramic sharpening rod, or diamond sharpening rod used to restore the sharpness of dulled edges. They are flat, oval, or round in cross-section and up to 30 centimetres (1 ft) long. The steel and ceramic honing steels may have longitudinal ridges, whereas the diamond-coated steels are smooth but embedded with abrasive diamond particles. Non-abrasive honing rods such as smooth ceramic or ribbed steel are able to remove small amounts of metal via adhesive wear. In normal use, the rod is applied to the blade at a slightly higher angle than that of the bevel, resulting in the formation of a micro-bevel.
Sharpening stones, or whetstones, are used to sharpen the edges of steel tools and implements, such as knives, scissors, scythes, razors, chisels, hand scrapers, and plane blades, through grinding and honing. Such stones come in a wide range of shapes, sizes, and material compositions.Stones intended for use on a workbench are called bench stones, while small, portable ones, whose size makes it hard to draw large blades uniformly over them, especially “in the field,” are called pocket stones. It can be divided into diamond sharpening stone, ceramic sharpening stone and flattening stone, etc.
Also, there are a raft of sharpening accessories, such as knife sharpening guide, sharpening oil and head of electric knife sharpener.