RE: Fog?

From: Eric Neilsen ^lt;>
Date: 01/27/05-09:14:54 AM Z
Message-id: <>

This seems reasonable. If the practice of coating/soaking paper in Oxalic
Acid carries any weight, one could assume that it is maintaining an acid
environment and preventing the ferric to ferrous conversion. UV Light, Heat
and excess water can all cause an apparent fog. An old and contaminated
developer can also be a source for a fogged print.

Eric Neilsen Photography
4101 Commerce Street
Suite 9
Dallas, TX 75226
> -----Original Message-----
> From: Jim Morris []
> Sent: Friday, January 21, 2005 2:52 PM
> To:
> Subject: Re: Fog?
> Could buffering agents in certain papers react with the coating -even
> before exposure- and create the same fog in an otherwise non-alkaline
> environment?
> Jim Morris
> DCP, Inc.
> On Friday, January 21, 2005, at 03:29 PM, Sandy King wrote:
> > Now, if one accepts the theory that the contamination is possible via
> > the substrate this might be correct. However, the fog that that I have
> > seen in these processes is more often caused by the conversion of
> > fesidual ferric salts to iron hydroxide in an alkaline environment
> > than by the paper itself.
Received on Thu Jan 27 09:15:00 2005

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