Re: update on lumen prints

From: George L Smyth <glsmyth@yahoo.com>
Subject: RE: update on lumen prints
Date: Mon, 19 Sep 2005 13:11:29 -0700 (PDT)

> My fear here is that the print is not adequately fixed, which begs the
> question, "How do you know that your fixing has been adequate?" A one minute
> fix with ammonium thiosulfate is adequate for many papers, but I am thinking
> that a diluted version of a weaker fixer for that amount of time would not
> suffice.

Sodium sulfide test would tell. But the test is destructive, so be
sure to make reasonable test samples and allow good safety factor.
Received on Mon Sep 19 19:16:13 2005