Re: Fog test. Was: Re: Making Digital Negatives (safelights for Pt)

Terry King (101522.2625@compuserve.com)
Thu, 30 Jan 1997 07:42:31 -0500

Message text written by "Jeffrey D. Mathias"
>
Note: A problem with HCl is that it will bleach the highlights. Oh,
you think you can give a little more exposure. Well, it seems that the
bleaching is non-linear (the highlights go first). This is especially a
pro<

Jeff

The main difficulty with using HCl as a clearing agent is that it damages
the paper. Compare a print cleared in four baths of EDTA disodium salts
with one cleared in baths of HCl at very low concentrations and you will
see what I mean.

Terry King