From: Darryl Baird (dbaird@umflint.edu)
Date: 07/25/03-01:11:13 PM Z
Dunno, except that there is a Sir John Herschel (?) example from the
1850s (??) in the Chris James book. Obviously, since the process depends
on the bleaching relationship of the plant pigment to intense sunlight,
they wouldn't be terribly practical for permanent display.
wishing I'd paid more attention in chemistry class...
Darryl
~~~~~~~~~~~~
Keith Gerling wrote:
>I once produced some gum photographs of vegetables that utilized pigments
>that I extracted from the actual subject matter. They pretty much faded.
>Here is an example of one of them, a beet that at one time was a rich
>beet-red: http://www.gumphoto.com/Vegetables/images/22.jpg
>
>I've been toying with the idea of using flowers. What is the lasting-power
>of those anthotypes?
>
>Keith
>
>more gums at http://www.gumphoto.com
>
>
>-----Original Message-----
>From: Darryl Baird [mailto:dbaird@umflint.edu]
>Sent: Friday, July 25, 2003 12:17 PM
>To: alt-photo-process-l@sask.usask.ca
>Subject: Re: Gum Pigments
>
>
>I'm very interested in this discussion of viable pigments.
>How about natural sources? There are many natural dyes and techniques
>for coloring everything under the sun, from paper to wood. I got lost in
>the myriad of information available on the WWW for stains, dyes,
>mordants, and agents of changing colors... I was just looking for a
>cheapo source for tannic acid, but I got a huge education(?).
>
>Also, I've been trying the anthotype process lately and my roses produce
>a beautiful violet-magenta color and an image in just about three days.
>I should try to produce a gum print with some of my pigment slurry. Ah,
>so little time so many experiments.
>
>-Darryl
>
>
>Keith Gerling wrote:
>
>
>
>>I'm not sure what Dick meant by "much popular opinion", as the gum printers
>>I know use every and all kind of pigment imaginable. (I think it was
>>
>>
>Steven
>
>
>>Livick that used to claim that the ONLY pigment worthwhile was some
>>outrageously expensive French product, but he is a rare exception).
>>
>>In addition to watercolor pigments, I use dry pigments, Dr. Martin's
>>Concentrated Watercolor, Createx airbrush colors, Sumi ink, and Mixol
>>pigments. All work well.
>>
>>Keith
>>
>>-----Original Message-----
>>From: Stuart W Melvin [mailto:swmelvin@earthlink.net]
>>Sent: Friday, July 25, 2003 11:05 AM
>>To: alt-photo-process-l@sask.usask.ca
>>Subject: RE: Gum Pigments
>>
>>
>>Hey Dick,
>>
>>Not only any brand....but any pigment/color. I was surprised this hornets
>>nest (hehe) went unnoticed 'till now. Must have something to do with the
>>suspension of the pigment at the higher viscosities but that is just
>>conjecture on my part.
>>
>>Stuart
>>
>>-----Original Message-----
>>From: Richard Sullivan [mailto:richsul@earthlink.net]
>>Sent: Friday, July 25, 2003 8:50 AM
>>To: alt-photo-process-l@sask.usask.ca
>>Subject: Gum Pigments
>>
>>
>>One thing that Stuart said that goes counter to much popular opinion is
>>that any brand of pigment works. I found that interesting.
>>
>>--Dick Sullivan
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
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