Date: Fri, 22 Feb 2002 11:50:46 -0500

Author: Gerald Zani

Subject: Re: Velveteen electrostatic demo

Post:

Jose,

I use as shallow a depth of oil/flock as possible. The shallower the
better. Only .125 inch or .250 inch depth of the oil/flock mixture. But
the dish itself is made a bit deeper. My dish is about .500 inch deep. I
do not fill it to the top, though. It is only half filled.

Use castor oil. It is thickest.

Get the flock from Constantine's http://www.constantines.com/
They call it Flock.

The electrodes cannot have sharp points or sharp edges or the charge will
bleed off. The tips and edges of your electrode configurations must be
rounded. I use four configurations; point and ring, dipole of opposite
charges, dipole of like charges, and parallel plates.

Jerry

At 09:36 AM 2/22/2002 -0500, you wrote:
>I am looking for some info on the acrylic chamber for the velveteen, or
>fleece in oil demo. How high is the chamber, and how critical is it? I
>know that leakage has been a problem, and I am using a 1/8th inch "O" ring
>to prevent the problem. Are there any other tips I should know about
>before I start building these demos. How wide should the copper plates be?
>
>Thanks.
>
>Joe

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