Jan van Dijk (janvdijk@bart.nl)
Tue, 06 Apr 1999 22:08:33 +0200
1.
Mercury as a developer agent for the Daguerreotype was invented by accident
by Daguerre. He noticed that an very underexposed hardly visible image
(latent image) had become quite visible after being in a closet containing
chemicals. Caused by mercury devoloping. See the whole story in the
wellknown standard works on the history of photography.
2.
Contact me off list if you are interested in unused sheets of Polaroid
Vectograph sheets.
3.
Contact me off list if you are intersted in an 8x10 inch lentincular
stereocamera. I used it professionally around 1980 to make freevision 3-D
lightboxes of 40x50 cm.
-----Oorspronkelijk bericht-----
Van: Richard Bolt <dick.bolt@gsfc.nasa.gov>
Aan: alt-photo-process-l@sask.usask.ca <alt-photo-process-l@sask.usask.ca>
Datum: dinsdag 6 april 1999 17:13
Onderwerp: Why Someone considered Mercury for Photography in early1800s?
>Hi, I'm new to this listserver, but not to photo history.
>
>I've always wondered why someone would think of mercury in the early 1800s
to use for photography. Was mercury known for fine droplets, and therefore a
good choice for fine detail? Was mercury one of few chemicals that would
stick to exposed silver nitrate?
>Dick
>
>In 1974 period I read every thing I could on making Salt Prints. I spent
several years experimenting. I did use Crane fine all rag paper as someone
else mentioned as a good choice. I however got my supply from the Dalton
dump as I lived in town in that period. Crane was making the paper from mens
underware rejects! Yes, rag is as rag was!
>I tried alot different sizing and salt compounds to see what the colors and
results would be. I was researching and buying salt prints, so I wanted to
be able to make counterfits ( all mine have ID on back of image section!) to
be able to detect counterfits!
>
>I am interested in Vectorgaphs. I wrote the Polaroid historian that works
at Harvard and was supposed to give a talk to PHSNE last weekend, but go no
response as of yet!
>To: mcelheny@MIT.EDU
>From: Richard Bolt <dick.bolt@gsfc.nasa.gov>
>Subject: Charles Debois Hodges & Vectographs
>Cc:
>Bcc:
>X-Attachments:
>
>I saw your biography in new PHSNE newsletter yesterday and wanted to write
you about Vectographs. Some past e-mail between myself & Eastman House
Andrew Eskind <andy@geh.org> ) are attached below that will likely explain
why I am interested. If you have time, I would like to know more about
Polaroid & the Vectrographs. Thanks---Dick
>
>name: Mc Elheny, Victor email: mcelheny@MIT.EDU phone: (617) 253-7992
address: E51-282
>department: Sci Tech & Society title: Visiting Scholar
>Below is part of e-mail that went to him:
>Charles Hodges had made stereo card photographs in 30s for Keystone. He did
child photography using one of the Biedler-Viking 5X7 twin cameras on one
focusing platform for child photography. One of the 3 built and patented is
in the Smitheonian & I have another. I think the 3rd was disassembled in
period. There were many copies of this type of design in photo magazines of
the 60s as I remember.
>He also used a Graphic stereo camera to make Polaroid 3D lintecular prints
called Vectoigraphs in the late 40s. He did the Grand Central huge wall
vectographs for " Life Savers" adds. I have one of his 4X5 samples of this
process. I wonder if Polaroid has one of the full sized ones?
>
>
>Life member and one of 4 founders of the 20 yr+ old PHSNE, Photographic
Historical Soc. of New England, now over 600+ world-wide. Collector of
Antique Cameras plus Collector & historian of US Salt Print Industry
1850-1859).
>*My main webb page http://www.his.com/~dickbolt/
>Rebuilding my Photo History Page slowly:
http://westwood.fortunecity.com/isaac/571/
>
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