Re: "speckling" v "staining "

Ryuji Suzuki wrote:
>
> From: Clay <wcharmon@wt.net>
> Subject: Re: "speckling" v "staining " (was New Orleans/glut)
> Date: Sun, 04 Sep 2005 11:09:38 -0500
>
> > After my post, I tracked down the MSDS sheet. It says it has 2-5%
> > Glut, 1-2% acetic acid and 5-10% sodium disulphite.
>
> The last one is strange. They might've added it to prolong shelf life
> of the glut but I bet it may upset the chemistry of dichromate
> process. (Even if it's for silver gelatin process, I wouldn't add
> sulfite of any kind to the sizing solution.)
>

I wondered about this but wasn't sure I trusted my knowledge enough to
bring it up; glad you caught it. (And it's not just a trace amount
either, it's quite a lot).
kt
Received on Sun Sep 4 16:10:44 2005