Re: Pyro.

Date view Thread view Subject view Author view

arkins@banet.net
Date: 09/26/00-09:52:51 PM Z


In my experience using both bisulphite and metabisulphite as a clearing bath to
remove dichromate stain from oil prints, metabisulphite in solution emits much
less sulphur odor than does bisulfite.

Joe Arkins
LIC, NY

Sarah Van Keuren wrote:

> > Please, can someone tell me what is the difference between Sodium Bisulfite
> > and Sodium Metabisulfite?Iam about to make a batch of pyro which calls for
> > the former, but I can only find the latter. What should I do?
> >
> >>Regards
> >
> > Cecil.
> >
> I have been told that they are interchangeable, at least for the purpose I
> use them for which is to eliminate the brown underprinting of overexposed
> gum bichromate when it does not contribute to the image.
>
> Along the same lines, I read recently in a manuscript that sodium sulfite
> can clear a gum print the same as sodium bisulfite or sodium metabisulfite.
> I haven't had a chance to try this yet. Does anyone know if this is true?
>
> Sarah


Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : 10/01/00-12:09:00 PM Z CDT