[pure-silver] Re: testing for complete fixation
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Thu, 16 Aug 2007 21:00:02 -0700
----- Original Message -----
From: "hksvk" <hksvk@xxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Thursday, August 16, 2007 2:31 PM
Subject: [pure-silver] testing for complete fixation
Back in March, Richard Knoppow stated:
can test for completeness of fixing by using either a
Sodium sulfide
test or a solution of KRST diluted 1:9. The KRST must be
used on well-washed prints or films because it fails where
there is an excess of fixer.
Should the print be wet or dry or doesn't it matter? Is
this true for both
KRST and the sodium sulfide tests?
If the stain is any intensity ranging from barely
perceptible to grossly
yellow or orange, does this mean fixation was not
complete, ie., there is
residual silver halide there? If so, does the stain appear
right away, or
does it take a few minutes or longer?
Thanks, Richard.
Harry
Missed part. Kodak recommends the paper be wet but with
surface moisture blotted. Probably the reason is to insured
the amount of swelling and uptake of the solution is
reasonably uniform.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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