long term storage of chemicals
Judy wrote, "I recently, for instance, threw out a large hunk of ferric ammonium citrate because it had turned into just that -- a really hard, solid hunk." For the first cyanotypes that I made, I used some ferric ammonium citrate that had been in my father's darkroom for at least half a century. It was "a really hard, solid hunk" in the bottom of an old glass jar. I used a hammer and chisel to chip out pieces to use. It took a while to dissolve but worked the same as the product in powder form which I buy now. My suggestion would be to never throw out old chemicals until you have tried them out. Suzanne Izzo
|