[pure-silver] Re: Sistan Saga
- From: DarkroomMagic <info@xxxxxxxxxxxxxxxx>
- To: PureSilverNew <pure-silver@xxxxxxxxxxxxx>
- Date: Thu, 23 Jun 2005 23:37:50 +0200
I'm sure half is better than none. I do it to reduce the risk from Sistan
residue. It still aids the spotting very well.
Regards
Ralph W. Lambrecht
http://www.darkroomagic.com
On 2005-06-22 04:51, "jeffrey" <puresilver@xxxxxxxxx> wrote:
> Any thoughts on a weak (say, half the recommended strength) solution of
> Sistan?
>
> I only use Sistan on my negs (35mm) as the last step after washing. I also
> never squegee or sponge them off - just hang them to dry. I've never seen any
> spots or mottling.
>
>
>
>> Quoting from a general Agfa chemical pdf file
>>
>> Mixing instructions
>> For use 25 ml SISTAN is diluted with 975 ml water. The
>> correctly processed and washed prints are agitated for one
>> minute in SISTAN solution after the final wash.
>> NB Too high a SISTAN concentration can lead to stains which
>> take some time to appear - particularly if prints are in close
>> contact (stored stacked). Care should then be taken that the
>> fronts and backs of prints are wiped before drying to avoid
>> partial over-concentration caused by dried drops of SISTAN.
>> Pinch and transport rollers on mechanical processors and
>> continuous dryers should be carefully wiped clean to stop the
>> SISTAN solution crystallising on them.
>> Yield
>> Up to 2 m©? black and white paper per litre ready solution
>> (equivalent to approx. 45 sheets 17.8 x 24 cm). The solution
>> can be used down to the last drop.
>> Storage life
>> The concentrate will keep virtually indefinitely in closed bottles.
>> Ready solution should be kept in capped glass bottles, not left
>> in open trays.
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