Pure ammonium thiosulfate fixer

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Dan Quinn - 20 Apr 2004 09:23 GMT

RE:tcporco@stat.Berkeley.EDU (Travis C. Porco) wrote

> I have a question:
> Is there anything wrong with the use of pure ammonium thiosulfate
> as a fixer for pyro-developed film? ... I have some of the "60%
> ammonium thiosulfate" made by Formulary.

I'm slowly working my way through a quart their 60%. I've been
using it for prints, one-shot, 1/4 oz per 8 oz of fix, single bath.
I add nothing to it.
I'll be processing some film soon but have not yet determined the
quantity. If you want to give it a try, use 1 oz for whatever your
volume; so much silver, so much chemistry.
The ph should be close to neutral. I'll take my pHep meter to it
one of these days.
I've found A. Thio as oderless as S. Thio, at least when used with
no additives. I'm a minimalist. Dan

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Dan Quinn - 20 Apr 2004 22:30 GMT

> RE: tcporco@stat.Berkeley.EDU (Travis C. Porco) wrote
> >
[quoted text clipped - 6 lines]
> using it for prints, one-shot, 1/4 oz per 8 oz of fix, single bath.
> I add nothing to it.

That 1/4 oz per 8 oz of fix is for 1, 8x10. Dan

> I'll be processing some film soon but have not yet determined the
> quantity. If you want to give it a try, use 1 oz for whatever your
[quoted text clipped - 3 lines]
> I've found A. Thio as oderless as S. Thio, at least when used with
> no additives. I'm a minimalist. Dan

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