From: Vincent Dobson (manitec@bellsouth.net)
Date: 07/28/03-04:09:36 PM Z
Have you thought to etch the glass surface first - say with hydrochloric
acid?
Vince Dobson
Visions In Nature
www.VisionsInNature.com
<:)-----Original Message-----
<:)From: Darryl Baird [mailto:dbaird@umflint.edu]
<:)Sent: Monday, July 28, 2003 5:31 PM
<:)To: alt-photo-process-l@sask.usask.ca
<:)Subject: Now for something completely different (from gum)
<:)
<:)
<:)Well not exactly different, but a switch in sensitizer... cyanotype in
<:)gum arabic.
<:)
<:)During a testing phase my wife Janet and I are conducting (for an artist
<:)book project), we decided to make transparent cyanotypes. Surfaces we
<:)tested include silk, vellum, hand-waxed papers, and glass. We've gotten
<:)more excited about glass than others, but vellum is easy to pull off and
<:)almost transparent enough for the project... a keeper certainly, but for
<:)later. Getting the cyanotypes onto the glass proved more problematic. So
<:)far, mixing cyano with gum arabic provided the best. most even coating
<:)and images. The problem lies with "developing" the image after exposure.
<:)The whole emulsion layer tends to wash (float) off during immersion in
<:)water.
<:)
<:)Any thoughts? How can I harden the gum or improve its "grip" on the
<:)glass surface? Could I lightly spray the image with water to removed
<:)unexposed cyano? The image looked really good according to janet... I
<:)was out getting some mulch wouldn't you know it.
<:)
<:)--Darryl Baird
<:)
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