The Cook-Pal Ren is a super unique line developed by Yoshikawa Co. and manufactured in Niigata, Japan. This is probably the first Wok that is made of iron, doesn't come with any sort of thin coating like Teflon yet it won't really stick. The special high-temperature treatment technique developed by Yoshikawa actually penetrates into the surface of the steel, therefore they won't peel off like Teflon coationg. This is particularly important when cooked with high-heat.
No need for burning off coating
The steel surface is not anti-rust coated, different from clear lacquer-finished products.
Therefore, the troublesome process of burning off coating is unnecessary and the product can be used as is.
Features of special high-temperature thermal-treated steel plate
When an steel surface is strengthened with special high-temperature thermal treatment, an oxidized layer that is over five times harder than normal steel is
formed. The layer covers the entire surface and also penetrates the steel. Therefore, no coating peels off when the surface comes into contact with a metal spatula or brush, different from inside resin-finished frying pans.
Hard to burn ingredients and rust-resistant
The oxidized layer on the steel surface has a number of small holes. Oil penetrates
into the holes, preventing ingredients from becoming burned.
Since the product is hard to get rusty, maintenance is easy. Simply rinse off with hot water and then wipe with a dry cloth.
Extra “steel content” for intake and high-flame cooking ability
Steel discharged from the frying pan during cooking adds extra steel content to ingredients. The product can be used with a high flame because it is made of highly-durable steel. As a result, you can fry ingredients in a short time for a crisp texture.