If ceramic knives are known for their sharp, be aware that over time they become blunt. And there are two solutions available to you: return to the factory (if you purchased a Kyocera, for me the only brand that masters this type of blade) or buying a diamond wheel sharpener for ceramic ( = = ceramic zyrconium synthetic diamond) does sharpens with this type of material. And then you do it yourself. Also this sharpener allows sharpening all other steel blades, stainless steel ect .. the house. However careful the form of plastic blades guides does not allow any blade sharpening on all their length. This sharpener was designed initially for Kyocera blades.
