[meteorite-list] RE: Polishing slices?

[Meteoryt.net]

> 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 ]--------