From: Dave Rose (cactuscowboy@bresnan.net)
Date: 07/28/03-08:24:19 PM Z
Greetings from Big Wonderful Wyoming,
My frustration with the Cibachrome process was the impetus to begin gum
printing 13 years ago. I'd been printing 16x20" Cibachrome prints from 4x5
Ektachrome originals. After elaborate production of highlight and contrast
masks to tame contrast, I was still experiencing a red shadow/cyan highlight
color shift. Certain subject matter (images of Indian rock art) looked
absolutely horrible on Cibachrome. So I turned to gum for greater control.
Using umber and sienna pigments with gum yielded prints of stunning beauty.
Although the color was not precisely 'correct', it was so appropriate and
natural for the subject matter that it simply worked.
Paint used for ancient Indian rock art was created using charcoal, iron
oxide, and other inorganic pigments. This was not exactly gum printing
(very funny Clay), but close in spirit.
You can see some of my petroglyph/pictograph images at:
http://www.alternativephotography.com/dave_rose.html
Best regards,
Dave Rose
----- Original Message -----
From: "Clay" <wcharmon@wt.net>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Monday, July 28, 2003 11:22 AM
Subject: Re: Re: Dry Dichromate and Gum, was Re: News from APIS
>
>
> FYI
>
> (c) Associated Press 2003
>
> Leading French paleo-curator Janko Youssef announced today that the
earliest
> known date of the so-called "New Gum" process has now been moved back
> approximately 31,000 years. Spectrographic analysis of cave paintings at
> Lascaux has determined that these are actually the earliest known examples
> of gum-dichromate printing. X-ray diffraction results confirm the presence
> of trace amounts of ammonium dichromate, gum arabic, and an unidentified
> brown organic pigment. Art historians have generally credited Mongo Ponton
> with the first use of the gum-dichromate technique, but will now have to
> assign credit to a Cro-Magnon man named Wug (no last name recorded).
> Researchers expressed amazement that not only was this the earliest known
> example of this process, but tangential evidence such as image clarity,
> gradation and quality seems to indicate that Wug used the dry dichromate
> technique, with another organic material containing human DNA material
> apparently used as a heat-releasable adhesive in the gum coating. It is
> still not known how Wug was able to develop the gum layer due to its
> position on the cave wall, but a general consensus seems to be emerging
that
> it involved Wug and some of his friends using a spraying technique with
hot
> water development (most agree that the water temperature was approximately
> 98.6 degrees F.) A representative image is located here:
>
> http://colophon.com/gallery/minsky/caves.htm
This archive was generated by hypermail 2.1.5 : 08/07/03-03:34:51 PM Z CST