The Johncrea ceramic knives are made of an advanced, high-tech ceramic called zirconium oxide (also called zirconia). Our deluxe black blade is even 20% harder than the white blade with better breakage resistance and sharper. 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. Zirconium oxide has a hardness of 8.2 mohs (vs. steel at 5-6 mohs and diamond at 10 mohs). Not all the ceramic knives are the same. Many of them were not heat treated enough or having too much impurity. The Johncrea knives have the highest quality and purity.
Frequently Asked Questions"
How do I sharpen ceramic knives?
Unlike traditional steel cutlery, ceramic knives generally do not need to be sharpened at all for their entire life. The Johncera stay sharp about 50 times longer than the best stainless steel knives. Ceramic knife can be sharpen with ceramic knife sharpener.
Will a knife shatter if dropped?
Ceramic knives will not shatter if dropped. As with any knife, however, the delicate tip can break if the knife is dropped on it.
How can I damage a ceramic knife?
You can break the tip (and possibly snap the blade off the handle) if you use a ceramic knife to pry, rather than slice. You can also chip the edge if you cut into bones.
How should I store my SC ceramic knives?
You can store your ceramic knives in a conventional wooden knife block, in an in-drawer tray, or in their original package.
Can this ceramic knife defect airport security?
Since 911, the airport security is concerned with ceramic knife. These knifes have zero metallic and invisible to any metal detector. However, they are visible to the new full body X-ray so please don't carry it onto your airplane.
Warranty:
1 year limited warranty against any manufacturer defect. It does not cover damage due to dropping, prying, and chopping into hard objects.
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