[pure-silver] Re: Film developer temperatures??
- From: jeffrey <puresilver@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Sun, 20 Mar 2005 09:33:58 -0800
If your present set-up works well, there is probably good reason to
stick to it, or at least close to it.
My own, very subjective, experience, with other films and developers,
is that I don't want to stray too close to 68F, because it seems to
me that developer activity falls off sharply below that temp. So,
since I may not control variables in the process as well as others on
this list, I feel the need to allow for some 'slack' in case I make a
mistake. If I am already at 68F, and I stray cooler, then the negs
are likely to be too thin for an easy print. If I start at 72F and
stray a couple degrees in either direction, at least the change will
be in a fairly predictable increment.
Just my 2 cents.
>I grew up using 20C (68F) as a standard temp. for film developing, and
>in my non-southern (NA centric view) location seldom had issues
>maintaining it, summer or winter. The cold water tap always delivers
>sub-20C water here. For unknown reasons, I started to wonder whether
>there are any significant benefits to using other (higher) temperatures.
>The only obvious one I can think of is shorter dev. times though I've
>not yet been rushed enough to pursue a higher temp. for that reason
>alone. (My previous reluctance to move chemical temps. beyond room (20C)
>temperature is dealt with by the JOBO CPA-2 now available to me.
>Sometimes it just makes a fine chemical-tempering unit rather than a
>developing system.)
>
>So, are there any compelling reasons to re-think my dev. temp.
>strategies? I seem to recall reading somewhere that
>Perceptol/Microdol-type formulations benefit from temps in the 24C (75F)
>range but can't remember the reasoning. What about other developers?
>Will I gain anything, beyond shorter dev. times? Are there implications
>for sharpness, grain, etc. with higher dev. temps? (keeping them in the
>realm of the reasonable)
>
>I frequently don't bother with the JOBO for a few rolls of film and use
>my old SS Nikor tank and reels. sheet film is always in the JOBO now.
>
>(In my darkroom, over the last few years, you would likely find devs.
>like my regularly used XTOL (1+3, never a problem had), FX-39 (when I
>can get it), Rollo-Pyro (from B+S), Perceptol (at 1+3) and even Pyrocat
>HD once. Films typically TMY or HP5 in sheet and Acros, TMX, Delta 100
>in 35mm/roll formats.)
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