I've used sand-paper on acrylic plastic - Don't think its nearly as bright as groundglass - but I've only used groudglass in a lens camera - haven't compared them properly.
It may work for something cheap and easy. Gord On Thu, 20 Dec 2001, G.Penate wrote: > > ----- Original Message ----- > From: "Murray" <upt...@uptowngallery.org> > > > > Has anyone ever tried making a 'ground glass' viewing plate (or whatever > you > > call it), either with 'non-glare' etched picture framing glass, or > > subjecting a piece of this or other glass to additional abrasion? > > I have used aluminum oxide powder, water to form a paste, elbow grease and a > small piece of glass to rub the paste in circular motion. You keep doing it > until the results are even (5 to 10 minutes for 4x5 a piece of glass) . I > use 600 grit aluminum oxide, would love to try finer grits but haven't found > locally, besides, 600 gives satisfactory results, you can find the powder in > science stores and in lapidary supply stores, few ounces is enough for all > your life time needs. I believe some people have used rubbing compound used > to polish car paint jobs, I have no experience with that product. > > Guillermo > > > > _______________________________________________ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??????? > unsubscribe or change your account at > http://www.???????/discussion/ > --------------------------------------------------------- Gordon J. Holtslander Dept. of Biology hol...@duke.usask.ca 112 Science Place http://duke.usask.ca/~holtsg University of Saskatchewan Tel (306) 966-4433 Saskatoon, Saskatchewan Fax (306) 966-4461 Canada S7N 5E2 ---------------------------------------------------------
