From: Neal Oshima (noshima@evoserve.com)
Date: 12/06/01-07:39:33 PM Z
Sandy,
Congratulations, that's a very interesting and thorough article on UV
sources. Did you find that the sharpness decreased at all in the mode B,
with the disk, or increased when the HID light source was elevated to
30-40"?
The reason I ask is that I have spent the past few years printing a series
of cyanotype and VDB photograms exposed through diaphanous textiles. The
prints were large, about 50" on the long side and I ended up using a 575
watt HMI light source (used in cinema lighting), bare bulb at about 40".
This gave me better sharpness than the FL bank, acting as a point light
source and covered the print evenly. One problem was that exposures were
quite long (45-70 minutes for VDB). From your research it sounds like the
HID will provide a similar quality of light, with faster exposures and
cheaper.
Thanks, Neal
> From: Sandy King <sanking@CLEMSON.EDU>
> Reply-To: alt-photo-process-l@skyway.usask.ca
> Date: Thu, 06 Dec 2001 14:44:55 -0500
> To: alt-photo-process-l@skyway.usask.ca
> Subject: UV Article
>
> I finally finished the article on UV light sources. If anyone is
> interested you can see it at http://unblinkingeye.com/
>
> Sandy King
>
>
>
> --
>
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