From: Sandy King (sanking@clemson.edu)
Date: 10/28/03-05:50:09 PM Z
Nze,
Do you have any details of the tests that Glafkides made? I would be
very interested in knowing what toning formula he used, his toning
method, and long long the toning lasted. And of course if he tested
for just free silver, or if he tested to differentiate between silver
plating or replacement?
Sandy
>Hi Sandy,
>
>the test made by a french chemist known as Glafkidès report that
>ther is still about 25% silver in the image after a pltinum toning.
>All the metal of the platinul familly give similar result (iridium ,
>ruthénium, rhodium,osmium, palladium) so you can try cheaper one to
>work with.
>
>I find about the same result when I work on Satista + and other
>metal development system.
>I did print satista develop them with silver and at last depending
>on the method use I get about 80% of platinumm. To find this result
>, I print wash and clear make a density reading , then put my print
>in nitric acid to wash the silver image and read again the density.
>
>The fact is that in satista + there is a sort of development and
>toning at the same time.
>
>Amicalement
>best regards
>
>Nzé Christian
>mailto:christian_nze@hotmail.com
>http://www.c-nze.com
>
>_________________________________________________________________
>Trouvez l'âme soeur sur MSN Rencontres ! http://g.msn.fr/FR1000/9551
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