--Dick Sullivan
At 05:24 PM 3/5/98 -0800, Tom Ferguson wrote:
>I've been doing quite a bit of cyanotype printing lately. While I'm very
>happy with the prints, I do have two questions:
>
>Question #1: The dreaded cyanotype mold attack: Is there anything one can
>do to prevent the "A" solution (25gm Ferric Ammonium Citrate, 0.5gm Oxalic
>acid, water to 100ml) from developing that white "mold" if kept more than a
>few days? I've always assumed that this was an indication to throw it down
>the drain? I also throw the "B" solution (9gm Potassium Ferricyanide,
>0.5gm Oxalic Acid, 0.2gm Ammonium Dichromate, water to 100ml) down the
>drain at the same time. I suspect that that is a bad habit. Is there any
>reason to suspect that "B" goes bad at all? Should I clean the "A" bottle
>with Chlorox (bleach) or something in between uses? Or just "Get over it,
>that's life, and the stuff is cheap"?
>
>Question #2: Solution separating: I have this habit, and I'm not sure were
>I picked it up. I'm convinced that the "A" and "B" solutions, once mixed
>together, will separate out. I thus pour the mixture back and forth
>between two beakers a few times before each paper is coated. I have no
>memory of were I picked this up, am I wasting my time?
>
>And for those who want to know: Yes, "Cyanotype Neurosis" is a mental
>illness recognized by the American Head Shrinkers Association. In two
>states (California and New York) it is even a viable legal defense ;-)
>
>tomf2468@pipeline.com (Tom Ferguson)
>