Difference Between A “Matte” Proof and A “Sandblast” Proof
Posted by slang on January 9, 2009
Both the matte and sandblast proofs have a softly lustrous granular appearance in sharp contrast to the brilliant mirror finish associated with current proofs.
The matte finish is produced by picklng the planchet in dilute acid; the sandlbast by pelting the planchet with sand propelled by a jet of compressed air.
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