Re: Gum dichromate issue

From: Christina Z. Anderson ^lt;[email protected]>
Date: 08/10/04-10:05:19 PM Z
Message-id: <008e01c47f58$7b883470$fa3dad42@oemcomputer>

Great, thanks for the source, I'll have to wild goose chase it. Maybe it
would be best to check out the collection at Eastman House and see if there
are a number of these there and by whom. Do you recall seeing any tricolors
over cyano in any museum or collection yourself, and if so, where?

>Judy said: I think the search for the first to *perfect* tri-color gum in
any form is
> to chase -- oh, call it a mental construct. But for what it's worth, my
> copy of Volume Seven of the complete Self-Instructing Library of Practical
> Photography, compiled & edited by J. B. Schriever and Thomas Harrison
> Cummings, published by American School of Art and Photography, Scranton
> PA., USA, 1909, has Chapter LXIII, Part V, "Three-Color Gum Process," on
> page 589, based on cyanotype for the first layer and gamboge, carmine and
> crimson lake (the latter 2 in equal parts for the red) for the next two
> coats.
> I also like the last section, which says, " Registration is easily
> accomplished by holding the print and negative up to a bright light and
> looking through them."
> In any event, by the time the method got into a book of this nature (a
> many-volume series), it was probably pretty well established.
> Judy
Received on Tue Aug 10 22:06:12 2004

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