[pure-silver] Re: Problem with 2 tray hypo (fixer).
- From: Laurence Cuffe <cuffe@xxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Thu, 03 Dec 2009 20:05:08 -0500
So much for my snap analysis! water is out as a factor, clearly. Just as a
snap check is there a significant difference in clearing time for a small piece
of unexposed film swirled around in each of them? This might be a crude way of
checking to see how much life is left in the darker one.
All the best
Laurence cuffe
On Thursday, December 03, 2009, at 06:37PM, "Bogdan Karasek"
<bkarasek@xxxxxxxxxxxx> wrote:
>Hi,
>
>I always use distilled water for I and II. Why does II change to an
>amber colour and I doesn't? The water came from the same 20 liter
>container of distilled water so I think we can exclude water as a variable.
>
>Bogdan
>
>
>
>Laurence Cuffe wrote:
>> At a guess, there has been a change in the Iron content of you water and you
>> are seeing some sort of a chelation complex appearing. This is very
>> speculative, but the only common changed factor appears to be the water,
>> hence my diagnosis.
>> All the best
>> Larry Cuffe
>>
>> On Thursday, December 03, 2009, at 06:02PM, "Bogdan Karasek"
>> <bkarasek@xxxxxxxxxxxx> wrote:
>>> 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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