I've also heard that the case colors on modern replica firearms, such as Uberti, are not actually from true case hardening. My Uberti 1873 Winchester has beautiful case colors, wonder how it's done?
Thanks, John...
John,
There are two types of case color hardening commonly used for firearms, neither are thru-hardening of the steel but topical skin case hardening........A.) Bone and charcoal case color hardening........B.) Cyanide case color hardening........
Uberti uses cyanide case color hardening as does Pedersoli, Beretta, Armi-Sport and some other Italian makers.....
Bone and Charcoal case hardening is run at a higher furnace temperature than Cyanide case hardening......as well as the obvious different sources of rich carbon......both have benefits for various applications.....
People with a torch are in the "shade tree" category, if that, with or without urine LOL, as are the faux (fake) topical kit painters, fake patina applicators and the like etc......
and they look exactly like what they are, junk.......
Multiple posts have been made here over the years, covering every possible detail of these various processes.....you can look them up should you be interested in specifics......
