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Re: [ARSCLIST] Audiodisc acetates with the while filmy surface
Thanks for your posting.
I fear I must disagree with your advice on two fronts.
1) Unless it's been reformulated, Windex contains ammonia, which
should not be used on lacquer-coated discs.
2) The act of cleaning, by any means whatever, may damage the playing
surface of a lacquer-coated disc, especially if the coating is
starting to separate from the base. So any type of cleaning may
remove some or all of the recorded material from the disc. Hence the
recommendation to make a copy before cleaning and another
afterwards. This conflicts with your advice, I realize; but the poor
archivist faces a bit of a dilemma:
copy before cleaning, risking damage to groove VS cleaning before
copying, risking loss of the recorded content. Please feel free to comment.
Experience here suggests that copying before cleaning does not always
damage the recorded groove; in fact, in many cases the discs play
better after cleaning, or at least play as well after as before.
Perhaps it's not what can be seen under a microscope that counts, but
rather the results of playing the disc(s).
At 06:34 PM 3/25/2008, you wrote:
Richard Warren wrote:
1) Try playing discs as they are -- sometimes the goo doesn't sound
(though it may clog the stylus and cause mis-tracking, in which
case you can play each side in segments).
NEVER try playing the disc without removing the whiteish deposits.
Look at it under a microscope and you will see little crystals of
the stuff... YOU DON'T WANT TO TRY PLAYING A DISC WITHOUT GETTING
THAT CLEANED OFF THE SURFACE!!! You risk severely damaging the
grooves if you do!
... Graham Newton
Audio Restoration by Graham Newton, http://www.audio-restoration.com
World class professional services applied to tape or phonograph records for
consumers and re-releases, featuring CEDAR's CAMBRIDGE processes.