Frequently Asked Questions

How do I sharpen a Kyocera ceramic knife? What is the ceramic knife warranty? How do I care for a ceramic knife? The answers to these questions and more are readily available.


What are ceramic knives made of?
These knives are made of an advanced, high-tech ceramic called zirconium oxide (also called zirconia). Zirconium oxide is extremely hard, wear resistant, and chemically inert. For the technically minded, zirconium oxide has a hardness of 8.2 mohs (vs. steel at 5-6 Mohs and diamond at 10 Mohs).

How do I sharpen ceramic knives?
You can resharpen your ceramic knife by using our resharpening service. Only Kyocera advanced ceramic knives can be sharpened with this service. We also offer a ceramic knife sharpener for Kyocera knives. It's a great at-home solution to refreshen and resharpen Kyocera blades.

Will a ceramic knife break if I drop it?
Any knife, whether stainless steel or ceramic, will potentially break at the tip if its dropped on a hard surface at a certain angle. Unfortunately, accidental damage can occur so we do offer resharpening services.

How can I damage a ceramic knife?
Two ways. First, you can chip the edge if you cut into bones. Second, you can break off the tip or snap off the handle if you use it to pry or twist.

Can I put my ceramic knife in the dishwasher?
We do not recommend this for several reasons. First, it's dangerous if someone forgets about the knife or reaches in the wrong way. Second, violent motion against other objects, especially hard plates, could chip the objects and/or the knife. Third, dishwashers ruin wood handles. The plastic knife handles are dishwasher safe on the top rack only. Finally, ceramic knives are very easy to clean with a hand washing or mild bleach solution (blade only).

Do Kyocera knives come with a warranty?
All Kyocera knives comes with a product warranty.

Where should I store my Kyocera ceramic knife?
You can store your Kyocera ceramic knife in a conventional knife block, in an in-drawer tray, or in the package.

Where can I buy Kyocera ceramic knives?
To check for the nearest retailer, go to Where to Buy.

Who do I contact if I want to sell Kyocera knives in my store?
Email us at We service retailers both directly and through our network of manufacturer's representatives.

Where are Kyocera knives made?
All of Kyocera’s ceramic knives are designed in Japan.  All of Kyocera’s zirconia blades are manufactured in Japan.  Kyotop and LTD series are exclusively made in Japan.  The Revolution series knives are assembled and sharpened in China.

How should I use my Kyocera ceramic knife?
For slicing fruits, vegetables and boneless meats, a Kyocera advanced ceramic knife has no equal. Even so, ceramic knives are intended to complement -- not replace -- your other cutlery. Use steel knives for carving, prying, boning, cutting frozen foods, and slicing cheese. Avoid flexing or prying. Always use them on a plastic or wood cutting board and avoid cutting on marble, stone or inappropriate surfaces like plates or kitchen tile. For more information, please see our care and use instructions. (pdf/52KB)

What is the difference between a black-HIP blade and a white blade?
A black (HIP) blade is made out of a black zirconium oxide and offers extra durability. This type of blade goes through an extra firing process called a "hot-isostatic press," creating a tighter weave between the ceramic molecules, thus creating a tougher blade. The white ceramic blade is also made out of zirconium oxide but does not go through this expensive sintering process.

Can I use a ceramic sharpening rod on a ceramic knife?
No. The ceramic sharpeners are used to sharpen all steel-based knives, including titanium because the same hardness principle applies. Ceramic is harder than all metals, so it is the ideal surface to re-sharpen these softer materials.

How do I say "Kyocera" correctly?
The correct pronunciation is "key-O-Sarah," which comes from "Kyoto Ceramics," the original name of the company.

What else does Kyocera make?
Kyocera is one of the world's leaders in advanced ceramics and electronics. We manufacture a wide variety of products including semiconductor packages, capacitors, thermal print heads, resistors, cutting tool inserts, circuit substrates, LCD panels, fiber optic components, car engine components, solar modules, laser printers, wielding nozzles, cellular/PHS phones, pump components, synthetic gemstones, thread and wire guides, antenna mounts, and lots of other neat stuff!

What are ceramic scissors made of?
These scissors are made of an advanced, high-tech ceramic called zirconium oxide (also called zirconia). This material, which is second in hardness only to diamond, was originally developed for industrial applications where metal components failed. Zirconium oxide is extremely hard, wear resistant, and chemically inert. For the technically minded, zirconium oxide has a hardness of 8.2 mohs (vs. steel at 5-6 mohs and diamond at 10 mohs).

Will ceramic scissors break if I drop them?
Ceramic scissors will not shatter when dropped. Like forged steel scissors, however, you can break the tip if the scissors land on the tip (very uncommon). You can also damage ceramic scissors by trying to cut very thick material or by trying to bend the blades. Ceramic blades are strong, but not flexible.

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