[PW] Re: "Gem"

[Adrian Smith]

Google define: dichroic

"A type of mirror, reflector or filter which selectively reflects
different wavelengths of light, permitting a projector to transmit more
visible light with less heating of the film. Dichroic mirrors are also
used for internal convergence of 3-tube single lens video or computer
projectors. Diffused Screen A type of rear-projection screen which
spreads the light striking it. Screen gain is typically less than 1 but
audience viewing angles are increased.
www.christiedigital.com/projection101/glossary/index.asp

"Glass which has a thin metal film vaporized onto its surface. The glass
transmits one color and reflects a different color. Each manufacturer
offers about a dozen different color combinations.
www.dazzleglazz.com/definitions.htm

"Displaying two colors - one by transmitted and one by reflected light.
www.startphoto.com/learn/glossary/glossary_di-dn.htm

Adrian, Leeds


-----Original Message-----
From: project-wombat-fm-bounces at lists.project-wombat.org
[mailto:project-wombat-fm-bounces at lists.project-wombat.org] On Behalf Of
Carol Bristow
Sent: 14 December 2006 22:54
To: list at project-wombat.org
Subject: [PW] Re: "Gem"


It's called dichroic glass, based on years of attending craft fairs
where various items of dichroic glass have been perused/perchased.

Carol Bristow
DPRA Incorporated
1655 N Fort Myer Dr  Ste 925
Arlington, VA  22209
ph: 703.682.2612
fax: 703.528.3100
 
-----Original Message-----
From: project-wombat-open-bounces at lists.project-wombat.org
[mailto:project-wombat-open-bounces at lists.project-wombat.org] On Behalf
Of Suzanne Guinn
Sent: Thursday, December 14, 2006 5:46 PM
To: list at project-wombat.org
Subject: [PW] "Gem"


This is for me, so no hurry. I bought a "gemstone" at a craft fair. It
is manufactured through some process with glass and minerals. If I
understand it right, the glass comes in thin sheets and is cut up in
small shapes of your choice. Layers are put together with various kinds
of minerals and heated in a kiln. The various kinds of minerals give
various colors. It looks almost like colored glitter in the glass. The
glass also can be various colors. It is very expensive - something $150
per 4 inch square piece of glass, (her cost). The lady who sells these
said it was called "diac________" which means two colors. Does anyone
know what that word is? Thanks, Suzanne Guinn Calvary Bible College
Kansas City, MO


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