On Dec 4, 2016, at 11:33 PM, Nicholas O. Lindan
<nolindan@xxxxxxxxxxxxx<mailto:nolindan@xxxxxxxxxxxxx>> wrote:
As to paper processing, the time/temperature relationship isn't critical. . .
. normal variation in darkroom temperature has close to nil effect if you
develop paper to completion. If you are pulling the paper early then you will
see some temperature sensitivity - but you are better off just going down a
contrast grade and developing to completion.
If you prefer not to develop to completion you can do a fairly good job of
correcting for developer temperature change by noticing when the image emerges
and then multiplying that by a whole number that gives the results you like.
You might find that you get the development you like when total time is 3X the
emergent time. Of course you must standardize on what you will count as the
image having emerged, but in practice this is not as difficult as you might
think.
I have a Zone VI compensating timer which works just fine for the temperature
ranges I encounter with tray processing B&W papers. The temperature probe is
designed for trays, so when I use an 8x10 Nova slot processor I rely on the
multiply-the-emergent-time approach if temperature change is an issue. It seems
to work just as well.
Myron
