[pure-silver] Re: 'Ripening' procedure for developer?
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Fri, 4 May 2007 01:40:32 -0700
----- Original Message -----
From: "Snoopy" <snoopy@xxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Friday, May 04, 2007 12:08 AM
Subject: [pure-silver] Re: 'Ripening' procedure for
developer?
Dear HArry,
At 22:59 03.05.2007, you wrote:
>I have heard it be said that, for optimum and consistent
>performance,
>developers should 'ripen' or 'cure' 12-18 hours after
>preparation.
I always do this for the developers I mix up from powder.
I let them sit at least overnight. I find it makes a huge
difference esp. if you want consistent results, this is
for b/w. I do this for both film and paper developers.
I also usually always put in a small amount (5-10ml) of
used developer into the new stuff (regardless if I used
liquid concentrate developer or one made from powder).
Again this is for b/w developers, especially for paper. If
I use really fresh developer in the machine, it takes
about 10-15 prints before things "get going".
In Germany this is called "using a starter". In fact AGFA
also made specific "starter" chemicals for their colour
processes as well, but again mainly for paper development
in the machines.
Love,
Snoopy
Developer starter is commonly used for the solutions
used in replenished systems so that the results are
consistent. Without the starter the developer/replenisher
system must be used for a time to reach equilibrium with
varying results during that time. AFAIK, all color processes
have starters for the developers and sometimes other steps.
Some photographers add used developer to fresh
developer to "season" it, a result which is similar to
adding bromide but may be somewhat different because the
used developer will have other materials in it as well. The
idea makes sense in a replenished system where the
performance varies until the system reaches equilibrium but
I am not sure it makes sense for one-use systems.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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