Sharpening Ceramic Knives: Wet Stone Method and Chip Repair
Sharpen ceramic knives wet (suppresses dust). Use diamond stones, not standard whetstones. For chips: score the boundary with diamond scribe, then grind to the line.
Ceramic knives can be sharpened on wet stones, but the process differs from steel knives. Wet sharpening suppresses ceramic dust into a slurry, making it safe when consistent water flow is maintained. Standard whetstones wear faster on ceramic — diamond sharpening wheels or diamond-coated stones are preferred for efficiency. For chipped ceramic blades: Score the chip boundary with a glass cutter or diamond scribe, then grind down to the score line. This prevents the chip from propagating further during sharpening. Diamond-coated surfaces are essential for chip repair — standard abrasives are too slow on ceramic. Ceramic knives maintain their edge far longer than steel but are brittle and cannot be flexed or used for prying.