Re: Vandyke Question
In my Alternative Process class today, we learned to do Vandykes. We were told to gently warm solution C before adding to the combined A and B. MIght try a warm/hot water tempering bath. Gary On Friday 22 February 2008 16:19, Scott Wainer wrote: > Good day List, > > I recently decided to print some images in vandyke and found a 2 year old > bottle of sensitizer hidden on the shelf. Thinking it was too old to use, I > mixed up a new batch only to find that when I added part c the sensitizer > turned cloudy and eventually separated with a clear liquid on top and a > grayish tan sludge on the bottom. I tried making a second batch thinking I > added part c too fast but I got the same result. I thought the water I > distilled might have been contaminated so I tried again with store bought > distilled water and it happened again. Frustrated, I ordered all new > chemicals from Artcraft and tried again today - same result. If I let the > sensitizer sit for 24 hours then filter it I get a clear liquid which lacks > contrast and is rather thin density wise. Anybody know what's going on > here? > > My formula is: > > Part A > 9 gm - Ferric Ammonium Citrate > 33 ml - distilled water > > Part B > 1.5 gm - Tartaric Acid > 33 ml - distilled water > > Part C > 3.8 gm - Silver Nitrate > 33 ml - distilled water > > Mix parts a, b, & c separately. Add part b to part a slowly with constant > stirring. Add part C very slowly with constant stirring. > > Any help would be greatly appreciated. > > Best to all - Scott
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