[pure-silver] Re: Old Agfa 120 Brown Black Developer {120 (Potassium Version) print developer}
- From: Steve <gl1500@xxxxxxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Sat, 3 Feb 2007 17:07:31 +1030
On Saturday 03 February 2007 14:33, Lee Carmichael wrote:
> Steve wrote:
> > Just thinking out loud :) perhaps I shouldn't but here goes.
> >
> > I don't have any Pot Carbonate in my darkroom but do have Pot Hydroxide.
> >
> > In the Agfa formula can a substitute with the Pot Hydroxide be made? If
> > so any ideas on quantities?
> >
> > Steve
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> I don't know if this will work but in Pyrocat HD Part B is generally Pot
> Carbonate but you can substitute Sodium Carbonate. in the US you can
> buy Sod Carbonate as Arm and Hammer Washing Soda. I have used that as
> a substitute for Pot Carb.
>
Thanks Lee but my reasoning for the Pot Hydroxide is the potassium content. My
uncertainty is how much hyroxide I would need to get the same or similar pH.
I don't even know if the hydroxide is a valid chemical in a print developer. I
would think it would be fairly active none the less.
I think I can feel a 250 ml batch in the making. With a large amount of guess
work.
I have the Sod Carb so that will be next with the addition of Pot Bromide.
Steve
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