Etching wootz, opinion needed.

ALEX · 7th January 2020, 09:51 AM

Quote:

Originally Posted by MichaelZWilliamson

That looks very much like someone heated a spot on the edge, either to straighten a deformation, or in attempt to re-harden a spot.

This is quite possible. These white spots are result of overheating, either during or after forging. They become permanent part of wootz structure/pattern and once they're formed there is no way to 'remove' them by different etchants or develop better wootz pattern or contrast.

ariel · 7th January 2020, 04:13 PM

Highly likely.
European bladesmiths of the 19 century got plenty of wootz ingots and forged them into blades using European custom of heating the ingot to “ white”.

Surprisingly ( for them) the beautiful wootz ingots produced boring monosteel blades:-) Now we know why: at temperatures above ~850C dendritic structure just melts away and there is no way to restore it.

That raises another question: how did Persian or Indian masters managed to forge together 2 different samples of wootz to create scarf welding with only a thin line of amorphous steel as a scar?

7th January 2020, 04:13 PM	#2
ariel Member Join Date: Dec 2004 Location: Ann Arbor, MI Posts: 5,503	Highly likely. European bladesmiths of the 19 century got plenty of wootz ingots and forged them into blades using European custom of heating the ingot to “ white”. Surprisingly ( for them) the beautiful wootz ingots produced boring monosteel blades:-) Now we know why: at temperatures above ~850C dendritic structure just melts away and there is no way to restore it. That raises another question: how did Persian or Indian masters managed to forge together 2 different samples of wootz to create scarf welding with only a thin line of amorphous steel as a scar?