[pure-silver] Re: AgfaPhoto Insolvency

On May 27, 2005, at 14:50, Richard Knoppow wrote:
>    I know whats in Sistan but not its actual formula. Fuji
> makes a stabilizer called Ag Guard. Its evidently not the
> same substance as Sistan but serves the same purpose. Both
> are stabilizers for  the image silver where toning is not
> desirable. Fuji did publish some limited research on
> Ag-Guard. It shows that its effective in preventing
> oxidation and sulfiding of the image but is not as effective
> as toning.
I've heard of that, but it's unobtainable in the US as far as I can  
tell.  The main reason I like Sistan over toning is I can use it on  
film; also that it doesn't require quite the same care that the  
toners I'm familiar with do.  If I can't get access to Sistan I  
probably won't be able to get access to Viradon either, but KBT is  
potentially practical; however, it will only be practical for paper  
as far as I know.  I know there was a lot of microfilm research that  
examined toning film in selenium toners, but I don't think they cared  
as much about the change in color as I would (since if the emulsion  
changes color it will change the effect of VC filters; selenium's  
intensifying properties would also be undesirable in a negative).   
Thus my concern.

If there's anywhere that imports Ag Guard into the US, then I'd like  
to hear about it as a contingency.

Graham


-- Attached file included as plaintext by Ecartis --
-- File: PGP.sig
-- Desc: This is a digitally signed message part

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (Darwin)

iD8DBQFCl61/2kJk3FmxWkQRAvvIAKCYDnqTqMVLmOWwv4HFys6jzxNZsQCfZag0
6DwJ2nyc91kSk+jslNlM0n4=
=UftM
-----END PGP SIGNATURE-----


=============================================================================================================
To unsubscribe from this list, go to www.freelists.org and logon to your 
account (the same e-mail address and password you set-up when you subscribed,) 
and unsubscribe from there.

Other related posts: