I wanted to put in a good mention for Richard Sullivan’s new blog, CarbonWorks. Richard is a brilliant photographer and photo chemist, co-founder of Bostick & Sullivan, the premier source for all things alt-process. I found his blog today and was reading up on some innovations he has discovered and published, including the Athenatype (a silver-based printing technique that yields a near-platinum print look) and a fumed silica treatment for alt process printing that helps boost dmax (maximum black density) a common shortcoming of many antique processes. Richard has been honored as a Fellow of the Royal Photographic Society for his work in reviving alternative/antique photographic processes and for inventing new variations on the same, specifically the Ziatype, a printing-out process variant on Platinum/Palladium. He is a master carbon printer (thus the blog title). He also teaches non-silver processes at Santa Fe Community College. Give the blog a read, and follow it if you’re interested in anything antique photo process related!
Well, my experiment with pre-acidification of Rives BFK for doing palladium/platinum/Ziatypes was a success. I got a flawless Ziatype over which I will now try several gum layers. My pre-acidification consisted of a 5 minute bath in 5% Oxalic Acid. I sized the paper AFTER the acidification bath. Image to follow.
Here is the image with the first two layers of gum over Ziatype. Colors are Alizarin Crimson and Sepia. I’m planning on doing at least two more layers, probably another sepia or burnt Sienna and then another red, maybe something deeper red.