Found this on the cameramakers list Try this: obtain some glass cut to size (this can be from your friendly glass shop or from picture frames - I get mine at garage sales). Go to your local auto parts emporium and get a tube of valve grinding compound. Squirt some between two pieces of glass, and with a circular motion rub the top sheet of glass over the bottom sheet of glass. Make sure you get complete coverage. If the valve grinding compound starts to dry out, clean off both plates of glass and squirt in some more compound. Rub for about 10 minutes, wash off the glass and see if it is "ground" to your satisfaction. If not, do some more.
> > 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 > --------------------------------------------------------- > > > _______________________________________________ > 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 ---------------------------------------------------------
