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Knives cai dao

After I read the cai dao article I bought a knife and it is the best knife for chopping herbs and vegetables. And it rusts.

I wash it with a silicon sponge to remove the rust and oil it with mineral oil. It appears clean but when I chop an onion I have faint rust on the onion. The cai dao will have a rusty smear.

Can someone address the use of the cai dao and the use of “rusty onions”!


  • The simple solution is Camelia oil! Used by Japanese cooks to keep their carbon blades rust free, wipe it on. and wipe dry with a paper towel.

    For rust spots, use a little coarse salt and neutral oil to scrub the blade clean.

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