Quote Originally Posted by ColdEye View Post
But is there a process that makes red images??
One of the old photos mags in the 70s had an article on making reddish colored prints using copper. The color was red, with a bit ot brown tint, if I remember right. It needed UV to print, and the time I played with it I never got a very deep D-Max on the prints.

The process uses copper sulfate, sodium citrate, sodium acetate, and potassium ferricyanide.

Here's an example I found on the web:

And a nice article on it: