I just fill a plastic carboy (beer brewing container) with water that is
20c. I use a 3 gallon container - it's not hard to nail the temp right
where you want it. In the summer I do have to keep a few bottles of chilled
water in the fridge to bring the tap water down a bit.
I mix the developer with the water from the carboy, and also use it for the
rinses between processing steps. Using HC 110 or Rodinal you don't have to
worry about the temp of the concentrate, since at 1:100 or 1:50 you will not
be altering the water temp much. I develop in my basement which says
between 65 in the winter and 72 or so in the summer - so the temp of the
fixer etc is not a concern.
In the summer I just let the final rinse flow from the tap - it may be 4 or
5 degrees warmer than the temps of the other solutions, but it does not do
any harm. In the winter I set the tap water to 20c and then let it drop in
temp slowly, as the flow from the hot water heater cools down - the problem
I have maintaining a steady temp in running water is that I need just a
little hot water, and the flow is not enough to keep the pipe hot. So it
starts at one temp and slowly drops - that's only a problem in the winter.
It may drop all the way down to the low 60's, but I have never had a problem
with reticulation.
I do wonder if adjusting time to compensate for temperature is truly
equivalent - personally I like to control the temp and develop at a uniform
time.
HTH -
MCC
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Mark Cassino Photography
Kalamazoo, MI
www.markcassino.com
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----- Original Message -----
From: "Don Sanderson" <[EMAIL PROTECTED]>
To: "PDML" <pentax-discuss@pdml.net>
Sent: Friday, July 15, 2005 10:59 PM
Subject: OT: Darkroom temperature control.
I've just purchased the components to design and build some
precision temperature controls for darkroom chemistry.
I have the heating part down but am at a bit of a loss as to
what to use for cooling the different solutions.
Other than keeping the entire darkroom at 68 degrees or below
does anyone have any ideas as to how to keep developer, etc.
at the correct temp?
Unfortunately the tap water here runs 70-74 degrees at its
coldest in summer.
I'd actually like to be able to run at 65 degrees to keep
developement times long and controllable.
My only thought is a large container of water in the fridge
that could be circulated around the bottles and tank.
Any ideas welcome.
Don
