U of S | Mailing List Archive | alt-photo-process-l | Re: Some Kallitype observations

Re: Some Kallitype observations

I have never used a diluted solution of potassium oxalate. I did try a 20% solution once and it appeared to work well. There was, as I recall, a bit more staining with it than with sodium citrate at 20%, but I attributed that at the time to causes other than the oxalate solution. I just never found a reason to do any more testing with potassium oxalate because sodium citrate works great and is both less expensive and less toxic than potassium oxalate.

My guess is that you could also dilute the sodium citrate to 5% or 10% for use as a one-shot solution, but I don't know that for sure and am involved and am not currently printing in kallitype so can am not set up to run some quick tests.


I am so glad you posted this and thanks for testing it. For the record y'all, the lower dilution in my Alt Proc Cond book for pot ox and kalli (3%) is not a typo but is an actual formula I came across in a few places. Rajul was kind enough to test it against the normal dilution of pot ox and discovered this, below. Any kallitypists out there, have you used this lower dilution, also? Those of you having problems with kalli staining or some other such thing, have you used the lower dilution or were you even using pot ox? Don Bryant, you do kallis, correct? I am just intrigued by why the dilution of the developer is so drastic and yet works better. Makes me wonder about dilution of our developers with pt/pd and if there is an applicable reason to use diluted developers. Probably not. I had one of my students (Camden, was that you?) try the old 7up or gatorade trick to develop his palladium print and it was a BUST so don't believe it. Maybe he didn't use the right flavor, heheheheh

Undaunted by the variables to choose from, when I saw potassium oxalate (KOX) listed among the slew of developers in Chris's chapter on Kallis in Alt Procs Condensed book, I tried it ( I happen to be overstocked). At 20% concentration, the print developed to a heavy, poorly differentiated detail. Diluted to 5% (I have not gone below this), tonal separations were clear and rendered in great detail. These compare well with prints developed side by side with Hall's developer and with 20% sodium citrate. At 5%, the toxicity of KOX may not be much of an issue (Spinach is loaded with oxalate!). Also, it permits one-shot use to yield cleaner prints, something I found with Pt/Pds.