[pure-silver] Re: Sistan Saga
- From: jeffrey <puresilver@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Tue, 21 Jun 2005 19:51:56 -0700
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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