Re: T55 Se toner, was RE: POP process

-----Original Message-----
From: "Breukel, C. (HKG)" <C.Breukel@lumc.nl>
Sent: Nov 9, 2004 3:46 AM
To: "'alt-photo-process-l@sask.usask.ca'" <alt-photo-process-l@sask.usask.ca>
Subject: T55 Se toner, was RE: POP process

> -----Original Message-----
> From: Richard Knoppow [mailto:dickburk@ix.netcom.com]

> Kodak T-55 is a type of Selenium toner made with Sodium
> Sulfide. Some of the toning comes from the sulfide.

Richard,

I do not believe that is correct, (unless boiling the stuff turns the
sulphite in Sulfide)

   I was going by memory and thinking of another formula similar to the one Ansel Adams has in early editions of _The Print_. T-55 appears to be similar to KRST. I also got copies of the patents refered to by Mees. These are similar to T-55, requiring long boiling. I would not try to make the stuff. I think KRST is relatively harmless but the process for making it certainly is not.

Richard Knoppow
dickburk@ix.netcom.com
Los Angeles, CA, USA
Received on Tue Nov 9 06:31:34 2004