What are ceramic knives made of?
Ceramic knives are made of an advanced ceramic called zirconia. This material, which is second in hardness only to diamond, was originally developed for industrial applications. Zirconium oxide is extremely hard and wear resistant. It has a hardness of 8.2 mohs vs steel at 5-6 mohs and diamond at 10 mohs.
The blade goes through a high-pressure molding process before being heated over several days of temperatures in excess of 1000c. Finally, we grind on a diamond wheel and polish the ceramic blade to form an edge and the final shape.
Why using ceramic knives ?
Ceramic knives have several advantages over traditional steel knives:
- They retain their original sharpness more than 10 times longer than steel knives
- Non-porous surface that will prevent the transfer of odors and flavors
- Ceramic will never rust
- Ceramic knives are very lightweight which will reduce the amount of physical effort and fatigue during cutting tasks.
- Easy to clean: simply rinse under warm water
What is the difference between a black blade and a white blade?
The zirconium oxide blade undergoes an additional firing process, turning it black. This makes the black ceramic blade harder than the white ceramic blade – and thus more expensive. However, both ceramic blade types are very hard and resistant so choosing the black blade over the white should be more a question of taste and design than extra durability.
Can I put my ceramic knife in the dishwasher?
Although they are technically dishwasher safe, we do not recommend washing ceramic knives in the dishwasher for several reasons. First, it's dangerous if someone forgets about the knife or reaches in the wrong way. Second, objects have a tendency to rattle and shift during the dishwashing cycle and this puts your ceramic knife at risk of damage. Finally, ceramic knives are very easy to clean since food does not stick to the surface, so simply rinse with warm water or mild bleach solution.
What can’t I cut with my ceramic knife?
Ceramic knives are for slicing purposes only and should not be used for any other purpose. NEVER force the cut, NEVER cut bones or frozen food and NEVER strike a hard surface with the ceramic blade as it can cause it to chip or the tip to snap off.
Where should I store my CeraKook knife?
We recommend that your CeraKook knives be stored in their original sheath (included) or in a knife block. Chipping may occur upon contact with other utensils as well as risks of accidental injuries.
Do ceramic knives need to be sharpened?
Ceramic knives retain their sharp edge much longer than a steel blade and should not need to be sharpened like traditional steel knives. With proper care, you may able to go years before you need to re-sharpen your ceramic knife. However, if the ceramic knife is under-performing, it can be sharpened with a diamond sharpener but we would recommend bringing the knife to a professional ceramic sharpening service instead.
Will my ceramic knife break if dropped?
Any knife is at risk of damage if dropped on hard surfaces. Like a steel knife, you can break the tip if the knife lands on it. Depending on the scale of the damage, the tip may be partially repaired. We recommend seeking a professional for any repairs or sharpening work.