[pure-silver] Re: 'Ripening' procedure for developer?
- From: "mail1" <mail1@xxxxxxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Sat, 5 May 2007 10:45:12 -0700
Do you mean 24 grams to 4 liters of H2O for an 8% solution?
A 2% solution will also work.
Also you might consider leaving out the Hydroquinone and increasing the
Metol to 5 to 7.5 Grams. In Metol Hydroquinone developers of low alkalinity
most of the silver reduction is accomplished by Metol, as the Hydroquinone
is a weakly ionized and almost inactive under these conditions, the increase
of Metol makes up for the Hydroquinone. Aeration of Metol Hydroquinone
developers, pH 8.4 to 8.8 causes an increase in activity, but low alkalinity
Metol developers show almost no change in activity. You also can reduce
Sodium Sulfite from 100 grams/liter to 75 or 50 grams to improve acutance.
Jonathan Ayers [mail1@xxxxxxxxxxxxxxxxx]
-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Jeffery Smith
Sent: Saturday, May 05, 2007 9:46 AM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: 'Ripening' procedure for developer?
I usually use divided D-76. Solution B is just borax, which cannot be
reused. It is also nearly impossible to get completely dissolved in the
water. That implies that it is just a saturated solution of borax, which
makes things easier. But being a stickler for following directions, I would
rather be able to dissolve all 240 grams of borax in 4 liters of water.
Nearly all of the really bad experiences I've had in developing film have
been traced back to developer behaving badly rather than user error (one
notable exception was the time I thoroughly rinsed the film between
solutions A and B when developing with divided D-76). I used distilled water
religiously. I have pretty much refused to entertain liquid developers
except for those I order directly from PF (I wish they had expiration dates
on the bottles). No bad luck with PMK Pyro from PF, but I'll probably order
new bottles before getting half way through my current bottles.
Jeffery Smith
New Orleans, LA
http://www.400tx.com
http://400tx.blogspot.com/
-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Richard Knoppow
Sent: Saturday, May 05, 2007 12:58 AM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: 'Ripening' procedure for developer?
----- Original Message -----
From: "Jeffery Smith" <jls@xxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Friday, May 04, 2007 6:52 PM
Subject: [pure-silver] Re: 'Ripening' procedure for
developer?
Then it is probably a good alternative to the borax. At
least it's worth a
try.
Jeffery Smith
New Orleans, LA
http://www.400tx.com
http://400tx.blogspot.com/
The formula for DK-76 is the same as the regular
(non-buffered) D-76 formula except for including 2.0 grams
per liter of Kodalk in place of the Borax. It doesn't appear
to be well known that Kodak stated that the amount of either
Borax or Kodalk could be increased up to 20 grams per liter
with attendant increase in developer activity. With the
regular 2 grams per liter of either Borax or Kodalk
development time in the example is given at 20 minutes. With
20 grams per liter of Borax it becomes 10 minutes. With 20
grams per liter of Kodalk it becomes 5 minutes.
Where a replenisher is desired the Borax in the normal
D-76R formula should be replaced with Kodalk, 7.5 grams per
liter.
There is probably no advantage to the use of Kodalk in
place of Borax in D-76 unless Borax is, for some reason,
unobtainable.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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