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Bichromate Silk Screen (was Mini-volcano)

Hi Jon,
I know you are capable of finding a book with a title like "Silk Screen
Printing"
from a supplier like Amazon, so instead I tried to find a web resource that
shows the simplicity of the method. I found that a description given for
the benefit of ceramicists was as good as any.

But as an illustration of the method's flexibility, I also provide this
pointer to
a bijou web resource: on making microdots, using photosilk screening to
a cellophane surface.
Hope they help
decalcomania for ceramicists
<http://departments.risd.edu/depts/ceramics/g1.html >
do it yourself microdots
<http://www89.pair.com/techinfo/Microdot/microdot.htm >


Brian W


At 09:47 AM 11/12/01 -0500, Jon Greenberg wrote:
Brian, this sounds pretty good. Can you provide or refer us to a protocol
for this one?

Jon

> ----------
> From: Brian Whatcott
> Reply To: phys-l@lists.nau.edu: Forum for Physics Educators
> Sent: Sunday, November 11, 2001 3:50 PM
> To: PHYS-L@lists.nau.edu
> Subject: Re: Mini-volcano
>
> At 02:41 PM 11/11/01 -0500, you wrote:
> >Yes it is a neat demo.
> >Ammonium dichromate decomposes to produce chromium(III) oxide, nitrogen
> gas
> >and water vapor. When this demo is presented in the open on a ceramic
> plate
> >or on a heat resistant padded steel gauze, the green oxide fluffy flakes
> will
> >tend to fly around and cause a mess.x\
>
> /snip/
>
> >Greg Darakjian
>
>
> I will admit to a certain bias. I think ammonium dichromate is better
> employed to
> provide a photo polymer of gelatin, which when applied to a cloth and
> exposed to a
> u.v light shining through a high contrast photo or stencil in contact with
> the cloth,
> provides a delightful means of stippling paint onto a substrate when the
> unlinked
> gelatin is washed off, and the mask dried on a frame.
>
> You may recognize this as a description of 'silk screen printing' .
>
>
> Brian Whatcott
> Altus OK Eureka!
>
>

Brian Whatcott
Altus OK Eureka!