My old neighbor (when I lived in LA,) worked at various times for CFI and
several other labs around town that developed movie film. told me that the
’soup’ they used for developer in the old b& w days was constantly refreshed
and got better with use and was treated like sourdough starter - they’d keep a
tank of it
handy for starting the next batch of developer if they ever needed to wash out
the developing line.
joe
Joe McGuckin
ViaNet Communications
joe@xxxxxxx
650-207-0372 cell
650-213-1302 office
650-969-2124 fax
On Jul 14, 2017, at 9:01 AM, bobkiss caribsurf.com <bobkiss@xxxxxxxxxxxxx>
wrote:
SENT TOO SOON!!! Let's try this again!
DEAR KEN & TIM,
Way back from the mid 70s until I sold my NYC studio and moved to
Barbados in 93, I had a 3 1/2 gallon D-76 processing line in a separate film
darkroom. I had a careful replenishment regimen. As I went through,
literally, hundreds (and over 1000 some years) of rolls of b&w film (and many
sheets of b&w 4X5) it would have been very financially inefficient to use
anything except a replenished line. After the first few dozen rolls and
replenishing, what was in that tank was only D-76 in name as I am sure that
things had radically changed including build up of bromide ions and exhausted
dev agents. But the results got better with age so neither I nor my clients
complained.
One place I was quite careful was with print dev. If it hit the tray,
it was NEVER saved to be reused to make prints. If is was barely used, a
very few times I might have saved some to make contact sheets.
Anywhom, replenishing can work.
CHEERS!
BOB
From: "Ken Hart" <kwhart1@xxxxxxxxxxxx>
To: "pure-silver@xxxxxxxxxxxxx" <pure-silver@xxxxxxxxxxxxx>
Sent: Friday, July 14, 2017 11:10:10 AM
Subject: [pure-silver] Re: Replentishing With New Developer
I never used replenisher with B&W chems- memories of my high school
photography teacher won't allow it!
But replenishment in C-41 is common for me. In the case of C41 Dev and fix,
the replenisher is the stock solution. However, to make working developer
from stock solution, you add developer starter. So in effect, there is a
difference between the working solution and the replenisher. With fixer, the
replenisher is the stock solution straight up.
For your question, I found this link:
http://www.apug.org/forum/index.php?threads/dk-50-developer.62109/ ;
<http://www.apug.org/forum/index.php?threads/dk-50-developer.62109/>
About halfway down the page is this response: "DK50 and DK50-R Replenisher",
where the poster gives the formulas. I'm not into the actual chemistry, but
there are differences between the developer and replenisher. The replenisher
has 2X Kodak Elon Dev Agent (Metol), 4X Hydroquinone and Kodalk (Sodium
Metaborate), and no Potassium Bromide.
Ken Hart
kwhart1@xxxxxxxxxxxx <mailto:kwhart1@xxxxxxxxxxxx>
On 07/14/2017 10:45 AM, Tim Daneliuk wrote:
When dealing with D-76 or DK-50, is it really urgent that one use the
replentisher chemistry? Why can't I just use fresh devloper (at the same
dilution) and top up the working developer with, say, 1oz of fresh dev
every use?
