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Mustafa Umut Sarac
07-24-2012, 02:11 PM
Photo Engineer is older than my father and crown jewel at this forum . I am very satisfied with his copper answer. Its hot and life is not easy , lets not make it harder for anyone.

Thank you PE for everything ,

Umut

Kirk Keyes
07-24-2012, 03:16 PM
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:
http://www.flickr.com/photos/36743746@N07/7183103554/in/set-72157629874246054/

And a nice article on it:
http://silverghost.stanford.edu/copper/index.html

holmburgers
07-24-2012, 03:33 PM
Has uranium printing been mentioned for red? If not... uranium.