Hi Bill:
The suggestion received to scan them on a flat-bed and then reverse the 
image in Photoshop should work well, but you must make sure you scan 
the plate emulsion side down, to avoid the possibility of diffraction 
effects through the glass, and to maximise sharpness.  You will also 
need to watch out for Newton's Rings where the glass contacts the 
scanner's pressure plate.

Takes me back a bit - my first exposure to photography, outside family 
snaps, was making photomicrographs of hydraulic joint sections for the 
prototype of the Hawker Harrier, still in service with the RAF and the 
US Marine Corps.  We did these using carbon arc light sources on 5x7 
(or maybe 6x8) glass plates, developed by inspection in trays, then 
contact printed for filing.

John Coyle
Brisbane, Australia


On Thursday, August 15, 2002 3:35 PM, William Kane 
[SMTP:[EMAIL PROTECTED]] wrote:
> Hey gang,
>
>     This is VERY off topic:  My brother, an art major, just obtained 
a
>
> large amount of glass plate negatives.  His medium is paint, though 
he
>
> has an interest in old photographs . . . anyhow, I'm trying to help
> him
> in finding a good solution for either scanning or reproducing these
> images.
>
>     We don't have access to a darkroom as of right now, but I may
>     think
> about building one in the next year or two.
>
>     Does anyone have any solutions for reproducing/scanning?  I 
prefer
>
> scanning.  We have a Microtek and a cheap HP . . . or might there be 
a
>
> way to use my Pentax LX to make negs of the plates?
>
> IL Bill
> -
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