Knives of Carbon steel
Many OOOMS kitchen knives are made of carbon steel. While stainless steel is the most common material for kitchen knives, carbon steel is often the choice of culinary professionals. That’s because a carbon steel blade, when properly maintained, retains a sharp edge for a long time.
Because there is a relatively large amount of carbon in the steel, the blade is very hard, but therefore not stainless. This means that the knife discolours quickly, especially when fruit acids are involved, for example. Depending on what you have cut, you can find different shades of grey on the blade. This is also called patina and is nothing to worry about. The patina partly ensures that the knife is less susceptible to rust in the long term. The knife will never become rust-free, which is why good maintenance is important.
Wipe during use
Place a slightly damp, folded tea towel next to your cutting board ready to wipe your knife while cooking. This is especially important after cutting acidic foods such as lemons, etc.
Clean after use
Immediately after cooking you can use soap and warm water to clean the blade. After dry the knife with a tea towel.
Dishwasher: don’t do it!
Never put your kitchen knife in the dishwasher. Besides that the detergent attacks the carbon steel, the handle is often not resistant to the heat and moisture in the dishwasher.
Rub with Oil
Make sure you regularly rub the blade and handle of your kitchen knife with oil. You can use a soft cloth and different types of oil such as mineral oil, olive oil or peanut oil.
Sharpen your knife
The best way to sharpen your knives is with wetstones. This takes some time and practise, but delivers the best result. An easier way to sharpen your knives is by the use of a knife sharpener. There are many variants available; we prefer a model with 2 grinding wheels or ceramic rods. Take your knife gently through the slot of a knife sharpener a few times and it is sharp again. To remove the last burrs, use a leather sling. This makes the knife extra sharp. You can also use the inside of a leather belt for this.
Remove rust spots
Did you accidentally leave your knife in the sink? You can remove the rust spots with a scouring pad. Prepare a tea towel to the edge of your work surface. Place the blade of your knife flat on your worktop by extending the handle over the edge. Use the sponge to gently remove spots from your knife from the handle to the tip. After this clean your knife and rub with oil.