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				 Nihonto Question on Re-Tempering 
 
			
			Greetings folks, 
 I know that this is not my usual area of expertise nor comment, but I do have a question concerning nihonto:
 
 Is it typical for a Japanese katana or wakasashi blade to be re-tempered?
 
 If so, why?
 
 Would it lower the value if it were re-tempered?
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