[pure-silver] Re: Can Someone Refresh My Memory Please?

  • From: <mark@xxxxxxxxxxxxxxxxxx>
  • To: pure-silver@xxxxxxxxxxxxx
  • Date: Wed, 06 Apr 2011 21:10:28 -0700

Let me take a shot at this one and see IF I remember correctly.  If the print is in the developer and no agitation, the solution right next to the print can become less effective as it reacts with the paper.  I think of it as forming a small pocket of developer that is working its little self to exhaustion, while the rest of the pan does little to nothing.  Just as if you put a drop of dye in a glass of water, it would eventually all be the same color but its not going to happen very fast.

But when you move that glass of water with a drop of dye in it, that color evens out fairly quickly.  Agitating the pan keeps fresh developer in contact with the print where its needed, and all the stuff that has reacted is moved away and mixed with the rest of the pan.

Ever get high contrast with old developer?  Ever use some old developer because that's all you had and needed to make a few prints?  Get the same contrast as you do with fresh chemistry?

How bad did I do Richard and what did I miss??

-------- Original Message --------
Subject: [pure-silver] Re: Can Someone Refresh My Memory Please?
From: Tim Daneliuk <tundra@xxxxxxxxxxxxxx>
Date: Wed, April 06, 2011 5:02 pm
To: pure-silver@xxxxxxxxxxxxx
Cc: "Michael A. Smith and Paula Chamlee"
<michaelandpaula@xxxxxxxxxxxxxxxxxxx>

On 4/6/2011 6:59 PM, Michael A. Smith and Paula Chamlee wrote:
> To increase contrast, give less exposure to the print and develop the print for a longer time.
>
> Stopping agitation will decrease contrast.

Yup, I know that, but *why*. Do the shadows stop getting darker or do the
highlights continue to develop "down" when you stop agitating? In
one case the developer exhausts while continuing to act on the other.


>
> Michael A. Smith
>
> On 4/6/11 7:50 PM, Tim Daneliuk wrote:
>> When developing a print if we increase time but stop agitating,
>> what densities will continue to develop and where will the developer
>> exhaust first and cease to work.
>>
>> I cannot for the life of me remember which way it works: Whether
>> the highights exhaust and the darker values continue to develop
>> or vice versa.
>>
>> Another way to say this: If I want to *increase* contrast by making the
>> shadows darker and "holding back" the highlights how to I do this when
>> developing a print?
>>
>> Bonus Question: Is there are similar/complementary effect when doing this
>> to film?
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