[pure-silver] Re: AgfaPhoto Insolvency

I have no trouble obtaining Sistan in the US. (Portland, OR)

The shop I regularly buy supplies from (Blue Moon Camera & Machine) 
stocks it. I *think* I've seen it at Pro Photo Supply, also in 
Portland.

Let me know if you'd like to get in touch with them.


>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.
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