[meteorite-list] RE: RE: Polishing slices?
From: Christian Anger <christian.anger_at_meteoritecentral.com>
Date: Mon Mar 21 13:24:54 2005 Message-ID: <20050307234733.86B838C49B_at_six.pairlist.net> Disagreement ! I also lay the sanding papers on a flat glass which has the same effect of producing a flat surface on the sample. I do not have rounded edges on my specimens. Also it is wrong to move the face of the probe in circles. You have to describe an "8" when moving the sample across the grains or paper - that's the real polishing technique. I also do NOT produce scratches. You have to take care not to withdraw grinding material from the coarser grinding papers to the next lower grinding grain size paper. Keep your sanding papers clean. Store every sanding paper extra, be careful and make the job with patience and love. I do not have the difficulties what Marcin is talking about. And diamond powders or pastes are expensive too. The technique I use only takes time. I own years of experience in polishing by using sanding paper and I also use it DRY - without any fluid (water, alcohol etc...) - I think nobody expected this - but that's my experience and it works - works very well and I have best results - without any scratches. You just have to learn it. Experience is all. It is a lot of work, for sure, but this belongs to curating a collection too, for me, at least. Cheers and good night, Christian IMCA #2673 www.austromet.com Christian Anger Korngasse 6 2405 Bad Deutsch-Altenburg AUSTRIA email: christian.anger_at_aon.at -----Original Message----- From: meteorite-list-bounces_at_meteoritecentral.com [mailto:meteorite-list-bounces_at_meteoritecentral.com] On Behalf Of Meteoryt.net Sent: Tuesday, March 08, 2005 12:26 AM To: meteorite-list_at_meteoritecentral.com Subject: Re: [meteorite-list] RE: Polishing slices? > I polish all my meteorite slices, endcuts, windowed meteorites with sanding > paper by hand. > I begin at 80 grit and then polish > with 120,220,400,800,1000,1500,2000,3000 grit sanding paper. I want suggest different technology. Sanding paper produce rouded edges on sanded surface, cost is high and durrability low. Better is to buy sanding/grinding powders. First You must buy normall piece of window glass as big as You like. Then You put in some powder and a few drops of water/alkohol/oil. But the best is water (alkohol disapear too fast, oil is ok only for iron meteorites). And then You move Your slice on surface making small circles on all glass surface. This is much FASTER than sanding paper and every new portion of powder that You can add is sharp, like new page of sanding paper. This technology make ideal flat durface. And what is inportand, grinded surface is perfect mat/dull. No scratches like from sanding paper. But after 1000-1200 grid powder it still need a finish polishing usng diamond powders or other high grade polishing powders to make a mirror polishing. grid 220 is good for remove saw marks 400 for remove scratches from grid 220 then You can jump to 800 and finish on 1000 or 1200 -----[ MARCIN CIMALA ]-----[ I.M.C.A.#3667 ]----- http://www.Meteoryt.net marcin_at_meteoryt.net http://www.PolandMET.com marcin_at_polandmet.com http://www.Gao-Guenie.com GSM +48(607)535 195 --------[ Member of Polish Meteoritical Society ]-------- ______________________________________________ Meteorite-list mailing list Meteorite-list_at_meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list Received on Mon 07 Mar 2005 06:47:32 PM PST |
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