[Jewelry making - Article 00429] - Re: [Orchid] Polishing cabs- low tech

[The Doctor]

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Hi Dawn,

    Sometimes when I deal with material that undercuts, I like to use
    diamond compound paste with cup brushes in my flex shaft after
    shaping grinding and sanding the stone. You can get it in grits down
    to 100,000 from several places. Because they are local to me, I get
    mine from Graves. You can order from them on-line at
    www.gravescompany.com and they are supplied in syringes that are
    labeled. Individual grits are available, as well as "kits" of more
    than one grit. They also sell diamond powder in various grits if you
    want to try making your own compounds, or charge faceting laps. For
    your application, I'd recommend the compounds. 

    Cup brushes are just as they sound, little brushes with bristles
    that point downward in an inverted cup shape. There are at least two
    types: white bristles are harder, black bristles are softer. Start
    with harder bristles and a heavier grit, working down to softer
    bristles with a smaller grit. Faster than sandpaper, but still not
    as fast as a cabbing machine. And that's really the point. I've
    always had better luck polishing materials that undercut by slowing
    down the process. Good luck, and let me know how you fare. 

James in SoFl

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