[alt-photo] Re: Uranyl Nitrate toner, where to get?

[Richard Knoppow]

----- Original Message ----- 
From: "eric nelson" <emanphoto at gmail.com>
To: "The alternative photographic processes mailing list" 
<alt-photo-process-list at lists.altphotolist.org>
Sent: Monday, November 05, 2012 5:38 PM
Subject: [alt-photo] Re: Uranyl Nitrate toner, where to get?


> Uranium nitrate toned silver prints aren't stable from 
> what I've heard, and
> have seen them bronze out.  I still have prints that have 
> not bronzed or
> changed much by my eye.
> If you can find uranium nitrate, formed as a by-product of 
> testing uranium
> which is done by pouring nitric acid on it, then you can 
> easily make the
> toner w/ferricyanide and acetic acid.
> e

    AFAIK, none of the metal salt toners produce permanent 
results including iron, copper, uranium.  The images are 
less stable than untreated silver.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com