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Whetstone Grit Numbers Aren't Just Marketing

Whetstone Grit Numbers Aren't Just Marketing
Photo by Didriks, CC BY 2.0, via Wikimedia Commons

A whetstone's grit number describes how coarse or fine its abrasive particles are: a low grit (around 200-600) removes metal quickly to fix a damaged or very dull edge, a medium grit (1000-3000) does routine sharpening, and a high grit (6000+) polishes and refines the edge for the last pass. Skipping straight to a fine stone on a truly dull knife wastes a lot of time, since it removes metal too slowly to actually reshape the edge — most home cooks only need a medium stone for maintenance and rarely touch the coarse end.

Sources & methodology: These tips draw on established food-science references — Harold McGee's food-science writing, America's Test Kitchen / Cook's Illustrated testing, Serious Eats' technique reporting, USDA food safety guidance, and peer-reviewed food-safety research (including UC Davis cutting-board studies) — not reworded recipe-blog consensus.

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