Powder Process / Dusting On
Hey nhemann, sorry I never responded to your posts on the topic.
I'm curious about your 3rd suggestion with the ion gun and charged aluminum plate.. that sounds interesting, though not for crystals right? A "patinograph" or some kind of image comprised of metal would be cool.
So Ian had suggested the dusting on procedure to me privately and I think that maybe if I learned a thing or two more about crystal growing that might work. The whole idea of dusting on, or powder processes, is to utilize those fabulous dichromates and their ability to harden and subsequently reduce the tackiness of an "organic body", i.e. gelatin, gum, etc.
Here are some formulas for dusting on from Wall & Bolas' Dictionary of Photography, Powder Process
Obernetter's Formula
Dextrine .. .. .. .. .. .. .. .. 60 grs. [grains I guess?]
White sugar .. .. .. .. .. .. 75 grs.
Ammonium bichromate.. ... 30 grs.
Glycerine .. .. .. .. .. .. .. .. 3 to 8 mins. [minims?]
Distilled water .. .. ... .. .. . 3 ozs.
Woodbury's Formula
Gum arabic .. .. .. .. .. .. .. 60 grs.
Glucose .. .. .. .. .. .. .. .. . 45 grs.
Glycerine .. .. .. .. .. .. ... . 10 mins.
Potassium bichromate.. .. .. 30 grs.
Distilled water .. .. .. .. ... .. 2 ozs.
It goes on to say, Mix by gently heating, filter, and preserve in a stoppered bottle. A plate is coated with either of the above solutions, and dried at a gentle heat, and then exposed under a positive... on removal from the printing frame a faint image is seen. The plate is then exposed to the air for a few minutes to allow it to absorb moisture , and fine plumbago [graphite], as used by electrotypers, is applied with a flat brush, when it adheres to those portions protected from light, and the lights and shades are represented more or less by a coating of graphite. When the image is fully developed, and there is no further adherence of the graphite, the superfluous powder is dusted off, the film is coated with collodion, and then well washed to removed the unacted-upon gum & bichromate...
So, maybe replace graphite with finely ground crystal "seed", let dry and soak in the appropriate solution long enough to grow crystals. Sounds easy enough.