Rubbing block | Article about rubbing block by The Free Dictionary
In marble polishing, a block of sandstone with which the preliminary operation of smoothing is done by hand.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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For edges, you need a scribe, snapping pliers, a cutter, saw, side nippers, a rasp or rubbing block
The original rubbing block
is glued to a dowel rod cut to fit inside the frame of th eImprimagic.