This is the Official Site of GRN -
Rodolfo Namias Group
old printing techniques
It is a group founded in 1991, named by the master of Italian photographic chemistry. Some amateurs became aware of the advantages to print their images on non-conventional sensible materials, in order to achieve a quality unobtainable on common silver-bromide papers.
Many old printing processes are known nowadays; they were discovered in past times by various photographic chemistry operators
Several processes can be classified::
1 - Gum dichromate
2 - Carbon pigment
3 - Salt prints
4 - Platinum-palladiotypes
5 - Iron salts processes
6 - Swelling processes: oil printing, resinotypes
7 - Special processes: metal etching, toning
8 - Mixed processes
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