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			Join Date: Nov 2005 
				
				
				
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			 Quote: 
	
   – The discoloration around weld zones is an oxide layer on the surface of the metal. It is measured in angstroms, usually several hundred to a few thousand. Wavelengths of light are also measured in angstroms, they are used for very tiny things. The discoloration can be removed from steel by rubbing with dirt (the traditional method used throughout history, around the world) and it does not take long, or affect the surface of the steel to any significant degree. Skilled forgewelds (and arcwelds, for that matter) even in very primitive cultures can only be detected by polishing and etching the surface, or by x-ray. Temper would be affected by a later weld, but how did you test your blade to determine the uniformity of the temper? Quote: 
	
   ), I could go on for hours about how valuable that hard-won steel is, compared to store-bought stuff that comes in convenient ready-to-forge sizes and all.  
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