Quote Originally Posted by Seraphim View Post
I wanted to chime in on the differential tempering.

I have it in my Russel Baldrdge custom razor as I wanted a hamon, which necessitates differential tempering.

Looks great! But having the spine softer than the edge menas that it will wear MUCH faster, and thus require taping the spine for honing.
Actually, Russel hardens differentially, and then -I think- tempers the whole blade. I.e. Russel doesn't differentially temper.