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Photography > Dark Rooms > Re: Adjusting d...
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Re: Adjusting development for temperature

by "jjs" <nobody@[EMAIL PROTECTED] > Apr 8, 2008 at 07:00 PM

"Nicholas O. Lindan" <see@[EMAIL PROTECTED]
> wrote in message 
news:XoSdnQKuG-lv52banZ2dnUVZ_v6rnZ2d@[EMAIL PROTECTED]
> "jjs" <nobody@[EMAIL PROTECTED]
> wrote
>
>> "a general rule of thumb for the range of 65 to 95F is that a decrease
of 
>> 10F increases the development time 1.5 times."
>
> Leading back to first-year chemistry ...
> http://en.wikipedia.org/wiki/Arrhenius_equation
> where the rate of a reaction doubles every 10C.

Perhaps for quite similar chemicals separately, but our developers are 
complex mixes.
 




 31 Posts in Topic:
Adjusting development for temperature
sometime.photographer@[EM  2008-04-06 12:46:05 
Re: Adjusting development for temperature
Andrew Price <ajprice@  2008-04-06 22:38:03 
Re: Adjusting development for temperature
<Pico>   2008-04-06 18:26:09 
Re: Adjusting development for temperature
Andrew Price <ajprice@  2008-04-07 21:38:36 
Re: Adjusting development for temperature
"jjs" <nobod  2008-04-07 19:43:55 
Re: Adjusting development for temperature
David Nebenzahl <nobod  2008-04-07 18:32:23 
Re: Adjusting development for temperature
"jjs" <nobod  2008-04-07 21:04:43 
Re: Adjusting development for temperature
"jjs" <nobod  2008-04-07 21:58:12 
Re: Adjusting development for temperature
"Nicholas O. Lindan&  2008-04-08 10:03:04 
Re: Adjusting development for temperature
tls@[EMAIL PROTECTED] (T  2008-04-08 15:13:29 
Re: Adjusting development for temperature
"jjs" <nobod  2008-04-08 19:00:29 
Re: Adjusting development for temperature
"Richard Knoppow&quo  2008-04-06 15:57:21 
Re: Adjusting development for temperature
tls@[EMAIL PROTECTED] (T  2008-04-07 01:12:31 
Re: Adjusting development for temperature
tls@[EMAIL PROTECTED] (T  2008-04-07 01:13:10 
Re: Adjusting development for temperature
tls@[EMAIL PROTECTED] (T  2008-04-07 01:13:56 
Re: Adjusting development for temperature
sometime.photographer@[EM  2008-04-06 19:09:24 
Re: Adjusting development for temperature
"Richard Knoppow&quo  2008-04-07 21:27:32 
Re: Adjusting development for temperature
Peter <w2tga@[EMAIL PR  2008-04-07 00:49:26 
Re: Adjusting development for temperature
sometime.photographer@[EM  2008-04-07 20:19:13 
Re: Adjusting development for temperature
sometime.photographer@[EM  2008-04-12 09:08:22 
Re: Adjusting development for temperature
"John" <john  2008-04-12 11:50:55 
Re: Adjusting development for temperature
"Nicholas O. Lindan&  2008-04-12 15:09:28 
Re: Adjusting development for temperature
"John" <john  2008-04-12 17:28:32 
Re: Adjusting development for temperature
"Ken Hart" <  2008-04-12 23:09:18 
Re: Adjusting development for temperature
"Nicholas O. Lindan&  2008-04-12 20:58:18 
Re: Adjusting development for temperature
"John" <john  2008-04-12 22:00:15 
Re: Adjusting development for temperature
"Dudley Hanks"   2008-04-13 05:17:02 
Re: Adjusting development for temperature
David Nebenzahl <nobod  2008-04-12 23:28:55 
Re: Adjusting development for temperature
"John" <john  2008-04-13 09:10:25 
Re: Adjusting development for temperature
"Dudley Hanks"   2008-04-13 18:39:15 
Re: Adjusting development for temperature
sometime.photographer@[EM  2008-04-13 09:31:21 

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tan12V112 Thu Jul 24 1:57:37 CDT 2008.