[pure-silver] Problem with 2 tray hypo (fixer).
- From: Bogdan Karasek <bkarasek@xxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Thu, 03 Dec 2009 18:02:38 -0500
Hello,
I need some advice/clarification regarding my fixer. When printing
fiber paper, I use the two tray method for my fixer and I mix it myself
using Sodium Thiosulfate in distilled water. When tray I is exhausted,
I do the usual routine, move the hypo in tray II to tray I and mix a
fresh gallon of hypo for tray II.
Recently, a phenomenon has happened for which I have no explanation. If
I am doing intensive work over several days, I leave the the chemicals,
Stop and Hypo (developer gets changed everyday) in their trays overnight
but each tray is covered with Saran Wrap to prevent oxidation. Never
had a problem until last week. Overnight, Hypo II changed colour to a
light amber (see photo) whereas hypo I did not. I checked hypo II for
exhaustion using Edwal's Hypochek and everything was clear. As a
precautionary measure, I mixed fresh hypo for tray II, covered it with
Saran Wrap at the end on the evening and next morning, tray II has the
amber colour whereas tray I is clear. I checked tray II with the
Hypochek and again, no evidence of exhaustion.
Since an image is worth a 1000 words, what you see in the photo are the
contents of tray I on the left, clear, and tray II on the right, amber
coloured.
By the way, the developer is Dektol 1:2 and the stop is Kodak Indicator
Stop Bath. Nothing has changed in my procedure, same trays for the past
number of years, always mix chemicals with distilled water.
Anybody have an explanation? This has never happened to me before.
http://s873.photobucket.com/albums/ab296/bkarasek/?action=view¤t=Hypo12-01.jpg
Cheers,
bogdan
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