That's because it's a very, very beta process. In fact, it's so low in terms of development and research that I took 200ml of the essential solutions home and am slowly working my way through the process in hopes of delivering more information. Effectively, it's a silver/iron process that when paired with selenium toning (pure, not KRST style with thiosulfate involved) it has the appearance and DMAX of a good PT/PD print, except very cheap by comparison. Beta is the keyword here. Sullivan focused his attention to the Oil Print, AKA Rawlings Print which we're almost %90 dialed. More on that at APIS, but it's very exciting. In a sense, he gets very focused and hands off projects for the rest of us.
Here's the best break-down of our Athenatype postings: http://thecarbonworks.com/blog/?page_id=1448
Sorry, wish I was a better chemist and could provide more information.
The reason why you find a lot with fumed silica is that the discovery of the two coincided chronologically, so it got mixed in with the other projects at the SkunkWorks. At the moment, we have about 5-6 experiments going on all the time. It's hard to keep things straight with a bunch of creative types.
From time to time I have had trouble with kallitypes, and other iron based processes not clearing completely on various papers. I have now switched to a series of clearing baths each of which contains 1 TBS citric acid, 1 TBS EDTA and 1 TBS sodium sulfite. This may be overkill, but so far I have not found a paper or iron based process which does not clear beautifully.
Klanmeister, are you toning with selenium metal or salt? Thank you.
All you need to know about the process and toner is towards the bottom of the procedure: http://thecarbonworks.com/blog/?p=380
B&S started mixing a more pure version of selenium toner because of the nasty effects it had on certain processes. I can ask Dana and find out his exact take on things (I just used the stuff, didn't mix it), but I believe it some sort of selenium metal base rather than salt.
What a tease! I've tried several times to find a source of guanidine carbonate just to try that athenotype process. I got close once, and then it was mysteriously not available. I assumed everyone had given up on them due to the difficulty of getting that stuff.
Where do you get yours?