Matt, the blade is not hot-blued.
When the blade is completed, it ALMOST! looks like a regular ol' simple carbon steel blade.
Then it is etched in Ferric Chloride.
The stainless is basically uneffected by the acid, but the acid attacks the core steel and etches it black. And the more manganese, the blacker it is.
That's why I use 1095 in my San Mai.
Originally posted by tomsm44:
San Mai with hot blued carbon steel core? This may be my favorite blade I've seen from anyone. If its a takedown, I'd love to have another handle made out of a nice hardwood for a night out on the town, though that one would be almost indestructible for a day in the field.
Love all of them,
Matt