Quote Originally Posted by bobwysiwyg View Post
Never heard of uranium toner, think I'll pass on that one.
I used Uranium toner in my youth and it worked well (and wasn't radiocative), gives a very red negative.

Copper toner/intensifier might work but the resulting negative is unstable. A Chromium intensifier works well but redeveloping in a Pyro staining developer adds even more intensification, I use IT-8 an Ilford print toner ocassionally and that's essentially a chrome based intensifying bleach and a Pyrocatechin re-developer.