Blue #1 steel has several different names which can confuse people that are just getting into Japanese knives. It is called Aogami #1 (aogami translates to blue) and it also can be called blue paper #1. Some people think that the blue is the color of the steel but this is not true. The steel has been wrapped in blue colored paper for decades and this is why it's called blue. (Blue) 1 (YSS) -. . .
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Blue #1 steel has several different names which can confuse people that are just getting into Japanese knives. It is called Aogami #1 (aogami translates to blue) and it also can be called blue paper #1. Some people think that the blue is the color of the steel but this is not true. The steel has been wrapped in blue colored paper for decades and this is why it's called blue. (Blue) 1 (YSS) - Also referred as Ao-Ko, or Ao-ichi-ko, where ichi is one in Japanese and ko is steel. Hitachi high carbon steel(C 1.3%-1.4%), very pure(P <= 0.025%, S <= 0.004%) specifically developed for tools and knives.
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