A quick Google revealed....
http://www.mdf.ru/english/exhibitions/moscow/mian/photo12.html
But you've been to Google ;~)
Julian.
----- Original Message -----
From: <Smhartphoto@cs.com>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Tuesday, November 01, 2005 2:44 AM
Subject: Ray Gum
> Recently I came across the following: "In 1912-13 the Moscow photographer
> A.
> Trapani invented the photographic technique of 'ray gum' -- a version of
> the
> gum-arabic process -- which enabled the photographer to create the
> illusion of
> a radial, fragmented texture."
>
> Unfortunately, that seems to be the extent of information on ray gums, and
> A.
> Trapani. Can anyone help?
>
> Thanks,
> Steve
>
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