Re: Adjusting development for temperature

On Sun, 6 Apr 2008 18:26:09 -0500, <Pico> wrote:

>> and then compensate for the actual temperature of your basement, using
>> their time/temperature chart:
>>
>> <http://www.digitaltruth.com/images/time.gif>
>
>And keep your fingers crossed and hope by chance the chart is right. 

It's a starting point, nothing more.  Most people who are seriously
interested in developing their own film take notes and compare the
results at different temperatures and dilutions.

>Many of 
>them are just straight-line extrapolations and that is not how all
chemistry 
>works. 

But over the short temperature range quoted (+14 to +24) it is a
starting point, and one recommended by Ilford and other manufacturers
of black and white film.

>Some of their film development specs are flat out guesses, 

Hmm... sup****ting data?

>some upon 
>a recommendation of a quesitonable source. 

Do you have any convincing sup****ting evidence of that assertion?

>One of those sources is a 
>hairbrained maniac who frequented this place and hasn't developed a roll
of 
>film for forty years. 

Being more specific would add credulity to that statement.

>Pure impressionism.

Indeed - but whose?