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