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Explained: What To Cut & NOT To Cut With A Ceramic Knife

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A ceramic knife may be one of the sharpest knives in your kitchen, but these knives are a lot more delicate than their steel counterparts. The nature of the ceramic material means there are limitations regarding what you can cut with your ceramic knife.

A ceramic knife can be used to cut boneless meat, poultry, fish, soft fruit, vegetables, and herbs. Never use a ceramic knife to cut vegetables with hard skins or hard central seeds, frozen foods, or any meat that still contains bones. The blade can crack, chip, or snap if used inappropriately. 

The ceramic material used in the making of ceramic knives is extremely hard, durable material, but it is not indestructible, especially on a thin knife edge. There are some items that you can cut with ceramic knives, but other materials and incorrect use of the knife can ruin the knife to the point of rendering it irreparable.

What To Cut & NOT To Cut With A Ceramic Knife
What To Cut & NOT To Cut With A Ceramic Knife

If you are interested in checking out the best ceramic knife we recommend buying a knife made by the Kyocera company. You can find this knife by clicking here (Amazon link).

What Can You Cut With A Ceramic Knife?

Ceramic knives are produced from an extremely hard material called zirconium dioxide. The material is easy to work with to make the knife blades when it is in their raw state.

Hardness is imparted to the material by sintering it at an extremely high heat, which hardens the zirconium dioxide to diamond-like hardness.

When the knife blade comes out of the sintering process, it is harder than steel and holds an edge better than a steel knife.

The ceramic material can be ground to a very thin edge, making these knives much sharper than any steel blade knife. However, the extreme hardness of the ceramic material comes at the price of brittleness. The ceramic blade is very hard, but it is brittle and prone to chipping, cracking, and snapping when it is used inappropriately.

The consequence of the brittleness of the ceramic knife blade is that the knife should only be used to cut boneless meat, soft vegetables, and fruit without hard stones in the center.

Are Ceramic Knifes Good For Cutting Vegetables?

Are Ceramic Knifes Good For Cutting Vegetables?
Are Ceramic Knifes Good For Cutting Vegetables?

Ceramic knives are good for cutting vegetables, but they are not good or suitable for cutting all vegetables.

Vegetables with tough skins or rinds, such as pumpkin and squash, should not be cut with ceramic knives. The skin of these vegetables is very hard, and the pressure required to pierce the skin will cause the ceramic blade to crack, chip, or even break in half.

Steel blade knives must be used to process these types of vegetables if they still have the skin on or if you need to process a whole pumpkin or squash.

If your pumpkin or squash already has its skin removed, the flesh of the vegetables can be cut with a ceramic knife.

When using a ceramic knife, any vegetables or fruit with a hard seed in the center, such as avocados or peaches, should be cut with extreme care. If the blade encounters the hard center with any force or twisting motion, it can be severely damaged.

Because ceramic is chemically inert, it doesn’t react with acidic and caustic foods. They also don’t transfer odors or tastes. Ceramic knives will not leave a rusty taste behind, making them great for cutting vegetables.

TIP: If you are looking for Japanese kitchen knives to chop and process vegetables, then you have many you can choose from. Find out the best Japanese knives for chopping vegetables in the article below:
The 8 Best Japanese Knives For Chopping Vegetables

Can You Cut Carrots With A Ceramic Knife?

Some vegetables are harder than others and may be a cause for concern when using your ceramic knife.

Raw carrots are a relatively hard vegetable, but are they too hard for ceramic knives? Raw carrots can be sliced easily with a ceramic knife. The knife’s sharpness allows the carrot to be cut into paper-thin slices if required or processed into thin julienne strips.

The main aspect of cutting carrots with a ceramic knife is not to twist the knife as you are cross-cutting the carrot. Cross-cutting is cutting across the width of the carrot. If you are cutting a large chunk off the carrot and you twist the blade during the cut, you run the risk of snapping the blade.

TIP: If you are interested in buying the best ceramic knife made by the Kyocera company check out the latest prices on Amazon.

Can You Cut Lettuce With a Ceramic Knife?

The question, “Can You cut lettuce with a ceramic knife?” may seem counterintuitive, but it’s actually an excellent method to preserve the freshness of a variety of vegetables. 

While lettuce has high water content, it is sensitive to oxidation. When it is cut, the enzymes activated by the cutting process produce compounds that lead to the browning of the lettuce. 

Typically, these brown spots appear at the base of the leaf or anywhere the lettuce is cut and can lead to the leaves turning an unsightly brown, negatively affecting the presentation.

While a steel knife can transfer odors and acids to the food, ceramic knives are inert and will not react with them. Additionally, a ceramic knife will not transfer smells from the cutting surface to other ingredients the knife is used to cut. 

So, if you have a sliced clove of garlic and then move to cut your lettuce directly after, the garlic flavor will not be transferred to the sliced lettuce.

Unlike a traditional steel knife, ceramic knives require less pressure to cut food, so you can be confident that your salad will be unbruised, crisp, and delicious.

TIP: Ceramic knives may be great to use, but they are prone to cracks and chips. How can you fix a chipped ceramic knife? Find out the step-by-step guide in the article below:
Step-By-Step Guide: How To Fix A Chipped Ceramic Knife

What Should You Not Cut With a Ceramic Knife?

Before you use your ceramic knife, you should understand what it is not meant for. While it can be sharp and durable, it should not be used to slice through bone, fish heads, or thick rinds.

A ceramic knife should not be used for twisting or prying or cutting anything hard, such as frozen food or meat on the bone. The inflexible nature of the ceramic material makes any twisting motion a risk of breaking the blade.

Do not use to cut watermelon, pumpkin, or squash with the rind on. A ceramic knife must not be used to cut a large block of cheese. The risk of twisting the knife during the cut is too great and can crack the blade or snap it in half.

Never turn your knife on its side and use it to crush a garlic clove. This action puts too much lateral stress on the knife blade, and it will snap.

You should never use it to open a plastic package or pry the lid off a can. You should also use it only on soft chopping boards and avoid scraping food off the board. Using the knife to scrape food off the chopping board can chip the brittle, sharp edge of the ceramic knife.

Ceramic blades do not respond well to side-to-side force and should not be used to cut frozen foods. They are also not suitable for tasks that require a flexing motion or twisting. These tasks can easily damage the cutting edge of a ceramic knife.

BTW: If you want to know more about Japanese and other types of knives and their sharpening check out the books listed above. These books are recommended by professional sharpeners and knife makers (Amazon links):

Conclusion

A ceramic knife is useful in the kitchen because of its sharpness, ease of cleaning, and, thanks to its non-porous material, it does not oxidize the ingredients. Most food residue will rinse off with water, and any residue will be easily removed with a microfiber cloth. 

This makes ceramic knives an excellent choice for anyone in the kitchen, but you must adhere to the basic rules of what to cut and not cut with your ceramic knife to ensure it lasts a long time!

TIP: What ceramic knife owners found is that these knives do eventually get dull, and then the challenge is how to sharpen a ceramic knife. Find out the step-by-step guide in the article below:
Step-By-Step Guide: How To Sharpen A Ceramic Knife

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