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.
What about mixing together lumen-prints, chemigrams, silver nitrate, or a cyanotype sensitizer… Sounds weird? I agree, but the results can be quite rewarding.
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.
The process is simple. Brush the paper and immediately expose it, still wet, to sunlight, fix and wash.
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.
Before fixing, a 3% hydrogen peroxide bath helps to lessen the effects of alkaline nature of the fixer.
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.
Perhaps due to the excess of silver, after fixing, some metalic silver patches can be seen on the top right hand side of the image.
Plenty of room here to test with papers, time and toning..