Sounds interesting, blade smithing has always been something I’ve enjoyed. I have had the luck of working on a solid range of blade types, from a Scottish Claymore to Japanese Blades (Katana, Wakizashi, & Tanto) plus a range of knives for different uses. I still don’t honestly believe I will master any of them in my lifetime, but doesn’t mean I won’t try!
I will have to check this out, maybe it will have what’s needed for me to make at least one high quality Japanese set. I have trained in kendo, and Nito ryu the dual sword technique, and would like to make my own quality set. The weapon is extension of self, forging my own would be the best way to fully bond with that extension.
I am new to the community so this may be something Everyone knows, but when I was learning in Japan the technique of strengthening the blade and creating the metal color variation. The use of extremely watered down fire mortar down the spine or mune, and than kinda drawing x shapes through it towards the blade side to create the tempered line once put back in the forge. Strengthens the blade and helps maintain its edge.
Combined with setting up you cooling baths with a compass, to be lined up with magnetic north and south, Since the molecules are moving at an extremely fast speed when hot, the magnetic poles have a greater impact on them, so when they rapid cool they do so with a stronger result. Sorry, if this is nothing useful just wanted to increase site activity.
OP: thanks for the info looking into book ASAP.