From: Richard Sullivan (richsul@earthlink.net)
Date: 11/08/02-11:48:46 AM Z
Not at all.
The gelatin is sensitized with a dichromate and then develops. The gelatin
swells where the light has not struck it and hardened it. Thus the swollen
areas are the shadows.
When the impression is made it is a 3D image of the photograph. The deeper
parts are the shadows and the shallow parts are the highlights.
The lead impression is filled with pigmented warm gelatin and a piece of
paper is laid upon it and lightly pressed down. The gel cools. The deeper
parts transfer more pigmented gelatin and thus are dark and the highlights
are white.
Any color you want.
Could be spectacular in 4 color!
The process you are talking about is the collotype process which is akin to
a gelatin lithography process.
--Dick
At 11:26 AM 11/8/2002 -0600, you wrote:
>Is this process where the halftone pattern is created by reticulating the
>image?
>
> yours curious,
>
> Garry D. Lewis
>There are two theories to arguing with women. Neither one
>works.
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