Diane Winters on mon 13 jan 03
Hi Mary,
Here's the fascinating site I think you're referring to, but the process
does not involve photosensitive clay, but rather a process for creating a
relief matrix based on a photographic image.
http://www.uwe.ac.uk/amd/cfpr/fotocerm.htm
The historic process they describe, involving a gelatine matrix, was used
for dust-pressed relief tiles in the early 1900's (these are technically
really quite amazing when you see them in person). These researchers at the
Centre for Fine Print Research have produced slip cast tiles using two
methods, (1) substituting polymer for the gelatine, and (2) even more
successfully have used digitized data from a scanned photograph to effect a
computer-controlled relief "carving" of the matrix (they do not specify
what this matrix is made of - just say they have used a variety of substrate
materials).
Regards,
Diane Winters
diane@winterstileworks.com
in Oakland/Berkeley by the Bay
Mary O'Connell wrote:
>I deleted the post from a couple weeks ago about a photosensitive clay
process that I >can't remember the name of.
Rick Monteverde on wed 15 jan 03
Diane -
The part about the photosensitive material that surprises me is how light=
can cure the material to varying depth for 3D coutours. I get the=
impression that the cure level would then be about the same for the entire=
thin layer of clear material for a given exposure, but they expose it from=
the backside with the photosensitive polymer on a clear plate so the deeper=
parts further from the base (ultimately the top surface) don't get fully=
cured and can be washed away. I wonder if screen printing photosensitive=
gel is what they use?
I've been looking into laser engraving as another way to create a=
photographic pattern for a mold. New machines have 3D software available=
that can throttle beam intensity for a varying cut depth controlled by the=
256 levels of grey in the photo. Techie love.
- Rick
>Hi Mary,
>
>Here's the fascinating site I think you're referring to, but the process
>does not involve photosensitive clay, but rather a process for creating a
>relief matrix based on a photographic image.
>http://www.uwe.ac.uk/amd/cfpr/fotocerm.htm
>
>The historic process they describe, involving a gelatine matrix, was used
>for dust-pressed relief tiles in the early 1900's (these are technically
>really quite amazing when you see them in person). These researchers at th=
e
>Centre for Fine Print Research have produced slip cast tiles using two
>methods, (1) substituting polymer for the gelatine, and (2) even more
>successfully have used digitized data from a scanned photograph to effect a
>computer-controlled relief "carving" of the matrix (they do not specify
>what this matrix is made of - just say they have used a variety of substrat=
e
>materials).
>
>Regards,
>Diane Winters
>diane@winterstileworks.com
>in Oakland/Berkeley by the Bay
>
>Mary O'Connell wrote:
>>I deleted the post from a couple weeks ago about a photosensitive clay
>process that I >can't remember the name of.
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