Fabio Giorgi gives us a brief overview on how to combine two processes: Chemigrams and Lumen prints, or possibly three, since he is using cyanotype chemistry for the chemigram.
A classic cyanotype.
This is what may happen when you end a cyanotype printing session with some sensitizer left unused, a pack of fogged photographic paper and, mainly, if the “What if…” pops up without warning.
Chemilumen: Chemigram and lumen print with ferric ammonium citrate.
In all tests the paper used was a fogged Kentmere VC Select RC paper, exposed 60 minutes under bright sunlight. UV index of 4. Fixing was done in a plain 5% hypo solution and the final wash was 5 minutes long in running water.
With silver nitrate 1-2%.
The reaction of the citrate with the silver in the paper makes the image very much similar to a Van Dyke brown.
With a low concentration silver nitrate solution the result is a salted paper look alike.
With silver nitrate 10%
Plenty of room here to test with papers, time and toning..
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For the portuguese version, go to http://alternativafotografica.wordpress.com/2012/08/02/quimilumens/
I have been doing this for about a year now, but I call my images “lumens with cyanotype- ” sometimes I paint the cyan onto the photog paper , sometimes I spatter it on, but usually I leave it to dry ,before solar exposing. My. work can be seen in this website’s gallery, too
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