From: Keith Gerling (keith@gumphoto.com)
Date: 07/10/03-09:33:40 AM Z
mmmm. Very interesting. Handy for backpackers!
-----Original Message-----
From: Christina Z. Anderson [mailto:zphoto@montana.net]
Sent: Thursday, July 10, 2003 10:07 AM
To: alt-photo-process-l@sask.usask.ca
Subject: weird gum formula
So here is the weird gum formula I promised--just for interest, not
practicality perhaps:
(1909, Aug 20, p 654,Vol LVI of the BJP): English Patent 27,686 Dec 19
1908, Josef Sury, Edmond Bastyns:
A *dry* sensitizing mix (kinda like Gum's version of Wondra Flour?):
gum Arabic, 20 pts
sugar 1 part
potassium bichromate 4 parts
pigment 20 parts (yes, 20 parts)
At time of use, mix the above with water 2x its weight. Brush on paper.
Does anyone know if or how I can access British patents--a URL like the US
patent office one?
Chris
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