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[Source] 3M Polishing Discs

Hello all, Does anyone have a source for the 3m polishing discs in
the one micron and finer. Rio has up to the Pink wheel which is what
they call pumice.

Gary Dirks
Janine’s Jewelry
Redding, Ca.

Hi Gary, Try Progress Machine & Tool in LA, 800-841-8665. Dave

We’ve got the 3M disks listed in the New Products section of the
upcoming July AJM…contact info is: 3M Center, Building 223-6N-01,
St. Paul, MN 55144; phone 1-800-742-9546, fax 800-852-4668, e-mail

John Shanahan, Associate Editor
AJM magazine
The Authority on Jewelry Manufacturing
Editor, AJM Online
800-444-6572, ext. 3037

Rio now has the 3M one and six micron radial bristle polishing discs.
I am adding an e-mail response from Rick Pihl to my question about
how the pumice grit size compared to the six micron polishing disc.

John McLaughlin
Glendale, Arizona

John, Some info from the Pumice manufacturer: FFFF is the grade of
pumice. Typical Screen Analysis… in this grade there is a Trace of 74
micron particles (Trace = less than .05 grams for a 100 gram lot) 16%
is 44 microns 84% is PAN (less than 44 microns)

Hardness on MoHS = 5.5 to 6.0

Pumice is softer, more brittle and porous than the polishing compound
in the 1 and 6 micron discs.

Best regards,
Rick Pihl