Re: ceramic blades
Ceramic blades are made from a form of cubic zirconium with a Mohs' Hardness c. 8.5 (diamond being 10.0). Hardened tool steel like a sharpening steel or file runs about Mohs 6.0–6.5 or so. Steeling a ceramic blade is likely just to dull the steel.
Originally Posted by Gold Rock
If you buy a Kyocera ceramic blade, it comes with free lifetime sharpening. You send it back either to the mother ship in Japan, or to their sharpening facility in California. They probably have other sharpening facilities in other countries as well.
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