hmm
my girlfriend is trying making her own glass negatives, using FOMA emulsion.
first try went well - not a problem with the emulsion adhering to the glass, but of course it wasn't perfect (which she is'nt after).
there was these small "black holes" in the plate.. which was expected (cleaning issues?), but then she tried. after reading the silver Gelatine book, that adding wetting agents to the emulsion, this could be helped...
so she did anf what happened? it looked fine in the developer (but the sensitivity of the emulsion was much slower that without the wetting agent), but as soon as she put it in the stop bath (palin water) the whole emulsion frilled and "left the scene"...
could it be because of difference in the temperatures from the developer and the water? (the water was much colder than the developer) or is there some other thing we missed?
tips highly appreaciated.
my girlfriend is trying making her own glass negatives, using FOMA emulsion.
first try went well - not a problem with the emulsion adhering to the glass, but of course it wasn't perfect (which she is'nt after).
there was these small "black holes" in the plate.. which was expected (cleaning issues?), but then she tried. after reading the silver Gelatine book, that adding wetting agents to the emulsion, this could be helped...
so she did anf what happened? it looked fine in the developer (but the sensitivity of the emulsion was much slower that without the wetting agent), but as soon as she put it in the stop bath (palin water) the whole emulsion frilled and "left the scene"...
could it be because of difference in the temperatures from the developer and the water? (the water was much colder than the developer) or is there some other thing we missed?
tips highly appreaciated.