ATM Plastics for machining

[Bill Marriott <btk@pacbell.net>]

Hi folks;

I'm putting together an 18" ring lap, for trying to get better at
producing flat flats, based on a design I saw at the Univ. Arizona
Optics Lab, and need some 1/2" thick clear plastic that I can cut,
drill, route, etc.

The two choices I have are cast acrylic, and Lexan (unless someone can
reccomend something else) .

If anyone has worked with these and can testifly as to their machining
ability, I'd appreciate any info on this.

TIA

Bill
--
Bill Marriott
htttp://www.starlightoptical.com
telescope/optical stuff