I did this by accident several years ago when I washed some film in hot water at the end of processing.
--shannon On Dec 5, 2007, at 4:28 PM, Claudio Bonavolta wrote:
----- Message d'origine ----- De: Shannon Stoney <shannonstoney@xxxxxxxxxxxxxxx> Date: Wed, 5 Dec 2007 16:06:36 -0600 Sujet: [pure-silver] holes in emulsion and temperature À: pure-silver@xxxxxxxxxxxxxIt suddenly occurred to me today that maybe the holes in the emulsion of my recent negatives (120 roll film) might have happened because thestop could have been colder than the developer. Could that be a factor? My darkroom is in the garage and sometimes in winter the solutions getpretty cold out there, even in Houston. I make sure the developer iswarm, of course, but I don't worry too much about the stop and fix. Butmaybe when the cold stop hits the warmer negative, it has a bad effect on it. Could this be the case? --shannonChemicals should have a similar temperature.If there is a strong temperature difference (hot -> cold) then you may obtain a phenomenon called reticulation, gelatins shrinks and you obtain a pattern similar to a pearl surface:http://www.ephotozine.com/article/Create-reticulationWith modern pre-hardened emulsions, it's pretty difficult to obtain such effect unintentionally. Anyway, I doubt your emulsion holes have been generated by reticulation.Claudio Bonavolta http://www.bonavolta.ch======================================================================= =====================================To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.
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