Quote Originally Posted by Bruno View Post
Yes, but...

Yes, It it a type of steel. But in its raw form, it is unuasable crap. It has to be forgewelded and folded several times before it becomes good steel. The folding process always goes with the tamahagane. The folding itself can leave folding scars, which are basically lengthwise inclusions. And the folding also leaves a pattern of faint lines also running lengthwise.

EDIT: I notice that Mike already wrote the same, thing, only more comprehensive
So, tamahagane is always folded BUT
folded isn't always tamahagane