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Re: [ARSCLIST] Audiodisc acetates with the while filmy surface
Hi Richard,
With all due respect, I will repeat my earlier remarks. It has been
demonstrated for over 20 years that the residues in question can be
safely & thoroughly removed with properly configured blends of ionic &
non-ionic surfactants. This approach applies to heavy deposits as well
as light coatings.
In extreme cases augmenting the primary formulation with a biochemical
research grade buffer can increase the capacity of the cleaning solution
& thus increase efficiency. Safety with these materials has never been
an issue.
The differences are audible not just visual.
Regards,
Duane Goldman
Richard Warren wrote:
Hi Tom,
The whitish substance is a product of chemical deterioration. My
experience suggests
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). You can try playing the discs
wet, too, though usually the goo prevents this method from doing any
good. ALWAYS copy the discs this way first, before any cleaning, in
case the lacquer is decayed enough to be ready to fall off the base.
2) The goo is difficult to remove. I've had best results using Lane
Audio's fluid with a painting pad to apply, as they suggest. This
method may take repeated soakings and cleanings (scrubbings) in order
to work. The results can be variable, depending on the degree of
degradation and can, alas, take the lacquer off the base, hence the
warning to copy before cleaning.
Good luck, Richard
.At 10:55 PM 3/24/2008, you wrote:
Is there any treatment that I can do to some AudioDisc acetates that
have a milky white coating on the surface? Is it OK to use a
non-alcohol cleaning solution or simple diluted ivory and a sponge?
Will playing the disks with the substance on them ruin them? This
batch appears to be wide-groove, probably 78RPM, do not know much
else about them. They would date from the mid-50's.
-- Tom Fine
--
H. Duane Goldman Lagniappe Chemicals Ltd. PO Box 37066 St. Louis, MO
63141 v/f 314 205 1388 http://discdoc.com