Re: Adjusting development for temperature

On Apr 6, 5:38=A0pm, Andrew Price <ajpr...@[EMAIL PROTECTED]
> wrote:
> On Sun, 6 Apr 2008 12:46:05 -0700 (PDT),
>
> sometime.photograp...@[EMAIL PROTECTED]
 wrote:
>
> [---]
>
> >I am just getting back into B&W film again, after a long hiatus. =A0Any
> >comments on an appropriate development time for the next roll?
>
> Check the times for the specific film you're using at:
>
> <http://www.digitaltruth.com/devchart.html>
>
> and then compensate for the actual temperature of your basement, using
> their time/temperature chart:
>
> <http://www.digitaltruth.com/images/time.gif>


Thanks.  This chart is similar to the values in the table, but maybe
using a different temperature coefficient?  As you can see, the
temperature scale is linear while the time scale is logarithmic.
Perhaps the temperature coefficient is the slope of the line.

Richard Knoppow wrote:
>The temperature coefficient varies with the developer
>and to some degree with the film so there is no absolute
>rule. For some guidance check Kodak film data sheets. Most
>have graphs showing the variation of development time with
>temperature as well as showing development times for various
>temperatures on the charts.
> ...

Why didn't I think of looking there?  The film I am using has been
discontinued a few years (stored in the freezer meanwhile).  The chart
for Plus-X only goes down to 65 deg F, though.  Maybe Kodak does not
recommend processing at low temps?  Thanks, anyway.

Plus-X tech sheet:
http://www.kodak.com/global/en/professional/sup****t/techPubs/f4018/f4018.jht=
ml