----- Original Message -----
From: "Joseph Tainter"
Subject: Re: OT: Darkroom temperature control.
Unfortunately the tap water here runs 70-74 degrees at its
coldest in summer.
----------
I have seen (but never patronized) photo-processing places in Mali, where
I have experienced temperatures of 140 F (60 C). These places do not have
any sort of cooling. I have always wondered how they process film. I
suspect that they just do it at whatever temperature the water and
chemicals happen to be at.
All the labs that I have run have had liquid cooling available. This ability
is dependant on a cool water supply though.
Emulsion will fall off the film at temperatures not much more than 50ºC, and
the C-41 process, while bombproof, will kaak entirely at about 50ºC as well,
as that is when the chemistry separates. I expect they are doing some sort
of cooling.
William Robb
