Quote:
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Originally Posted by Manolo
Hi Ferry,
The citric acid will darken the edge considerably if it's tempered. If you have the differential temper, then it may mean you have a forged Japanese sword. If there is a hamon, then Mr. Mishina may be more interested to examine the sword. If there is no temper line, then it could be the mass-produced WWII kind or a newer piece.
Here is an example from one of my blades.
Emanuel
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as I know, the mass produced WWII sword also has temper line.
my sword once been cleaned using citric acid, and it remove all the rust.
and at the same time showing some kind of different colour on the edge...left the tiny dots forming a line( like
nie ) like this picture. but maybe I should try put some citric acid again, just to make sure...thanks manolo.
regards,
ferry