U of S | Mailing List Archive | alt-photo-process-l | RE: LC-1 developer question

RE: LC-1 developer question

Indeed in this particular case, my concern/question was not whether David
de-oxygenzting the water but whether he dissolved all the sulfite first,
which would make his dissolving of Metol difficult.



> -----Original Message-----
> From: Richard Knoppow [mailto:dickburk@ix.netcom.com] 
> Sent: Sunday, March 30, 2008 2:29 AM
> To: alt-photo-process-l@usask.ca
> Subject: Re: LC-1 developer question
> -----Original Message-----
> >From: Ryuji Suzuki <rs@silvergrain.org>
> >Sent: Mar 29, 2008 10:39 PM
> >To: alt-photo-process-l@usask.ca
> >Subject: Re: LC-1 developer question
> >
> >There are a lot of things that don't really matter in real 
> life and if 
> >you look at old literature you'll find a lot of them.
> >
> >Both Metol and sulfite can react with molecular oxygen dissolved in 
> >water, but in reality, the rate of that oxidation reaction is rather 
> >slow. Compounds that react with oxygen fast are not very useful as a 
> >developer preservative.
> >
> >It doesn't really make much difference regardless of which gets 
> >dissolved first, since a pinch of sulfite is not
>     To clarify, I assume you mean in terms of the 
> de-oxgenating the water since dissolving the sulfite first 
> makes dissolving the Metol difficult.