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Von: "Gary A. Galo" <[log in to unmask]>


> I believe alcohol is a solvent to the celluloid surface on a
> Diamond Disc. It's also a solvent to shellac, so it shouldn't be
> used on the vast majority of "78-rpm" records. 

The surface of a Diamond Disc is a proprietary polymer called
Condensite.  I don't know if it's related in formulation to celluloid,
but the Edison company recommended cleaning Diamond Discs
with alcohol.  I'm trying to find out if one specific category of
alcohol, like rubbing alcohol, will work safely while others, like
grain alcohol, will not.  I've always avoided rubbing alcohol for
most cleaning chores because it contains a lot of extra ingredients
besides the alcohol itself.