[alt-photo] Re: SPE and Liquid light developer hardner and fixer dilutions

[Erich Camerling]

Dear Francis,

You can use Sodium metabisulfite (Na2S2O5 ,CAS nr: 7784-46-5)  instead 
of Potassium metabisulfite (K2S2O5 ,CAS nr: 16731-55-8. ) Unfortunately 
I don't know the stability of Sodium metabisulfite .Potassium 
metabisulfite is stable for a space of years
when you store the solid matter DRY (in a glass bottle).
Kind regards,

Erich 

Peter Friderichsen schreef:
> Francis,
>
> Re Sodium Metabisulfite vs. Potassium Metabisulfite?
>
> AFAIK they can be used interchangeably. The latter is more often used 
> in wine/beer making to keep sodium out of the diet although I have 
> seen the sodium salt also available for sale. The former is less 
> expensive so it is used more often in non-food applications.
>
> Peter
>
>