Knife sharpening
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Not to be confused with The Knifegrinder or The Knifegrinder (Goya).
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 with hard particles, such as sandpaper. Additionally, a leather razor strop, or strop, is often used to straighten and polish an edge.
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