Robert Mayrand wrote: > > I've been all around town trying to find the right grit. Knowing that some > of you recommended carbodorum grit 600, I went to a jeweler who just happen > to be an amateur of astronomy who built and polish his own lens. So he sent > me to a few astronomy shop where you buy telescope and they all seem to have > this in stock or at least know about this, unfortunately they did'nt have > any carbodorum at the time.....but that's another source for sure. > > The only thing I found for now is aluminum oxide but someone told me that > this is not rated the same way, anyway I bought a small quantity of each > grade they had in stock 80 240 & 400 but I don't know if this would do....so > I ask for help before ruining another glass! Some people told me that it's > easier to work with carbodorum because it stay on the glass longer....but > another one told me that it's a lot coarsier than aluminum and gives a less > uniform finish.......any comment would be appreciated. > > Thanks > > Robert > Mtl, Quebec > > _______________________________________________ > Cameramakers mailing list > [EMAIL PROTECTED] > http://rmp.opusis.com/mailman/listinfo/cameramakers
I do think you are gilding the lily. 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. If you need grids or scribe line, lay them in with India ink. Regards, Marv _______________________________________________ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
