[pure-silver] Re: holes in emulsion and temperature
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Thu, 6 Dec 2007 12:52:23 -0800
----- Original Message -----
From: "Shannon Stoney" <shannonstoney@xxxxxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Thursday, December 06, 2007 7:31 AM
Subject: [pure-silver] Re: holes in emulsion and temperature
Somebody said that when you use a water rinse, you should
use two batches of water. Is this true?
I did use Kodak's directions for diluting stop: 18mls per
liter. Is this too strong?
--shannon
Is this for glacial (concentrated) acid or Kodak
Indicator stop? Indicator stop bath is about 50% acetic.
For the indicator bath the resulting stop will be about
1.8%, which is about right. For concentrated acid use about
half the amount.
Most formulas call for 28% acetic, which is a convenient
stock concentration. The amount for normal stop bath is 45ml
to water to make 1.0 liter. Stop baths of this concentration
should not cause any problems.
I don't like water stops. The developer must be pretty
much washed out of the film or paper. I suppose a plain
water rinse between development and fixing in an acid stop
bath might reduce the amount of gas generated in the fixing
bath but I don't really think this is significant. Again,
the only developers which evolve gas in an acid bath are
those containing a carbonate.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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