From: Scott Walker (walker@sympatico.ca)
Date: 07/25/03-12:00:33 PM Z
Orthochrome T was made by Hoescht. I have their literature on it. I have
talked to Hoescht and the company that synthesised it after Hoescht got out
of the dye business. My first sample came from the rare chemical library. It
was priced at 3.2 million dollars per kilo. I paid about $100.00 dollars for
a .25 gram sample that the university tested. I found a company in India
that synthesized it for me at cost of $750 a kilo and yes, I do compare the
structure.
Scott.
-----Original Message-----
From: Ryuji Suzuki [mailto:rs@silvergrain.org]
Sent: Friday, July 25, 2003 12:22 PM
To: walker@sympatico.ca; alt-photo-process-l@sask.usask.ca
Subject: Re: Bromo-iodide Silver Gelatin Emulsion as an Alternative
process
From: Scott Walker <walker@sympatico.ca>
Subject: RE: Bromo-iodide Silver Gelatin Emulsion as an Alternative process
Date: Fri, 25 Jul 2003 12:11:55 -0400
> It was an unfair question - I have read almost every reference to
> Orthochrome T. Many references to the formula are wong...
1. how do you know there is unique identity for Orthochrome T and
what you got is the correct reference?
2. when you find multiple references, do you compare for the *actual*
*structure* of the dye, not just matching for the string?
-- Ryuji Suzuki "Reality has always had too many heads." (Bob Dylan, Cold Irons Bound, 1997)
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