Re: LP (vinyl records) ripping?

On 31 Oct 2007 09:31:59 -0400, kludge@xxxxxxxxx (Scott Dorsey) wrote:

In article <012700e4$0$7223$c3e8da3@xxxxxxxxxxxxxxxxx>,
Peter Larsen <plarsen@xxxxxxxxxxxx> wrote:
peter wrote:

My family has about 2 dozens LP (about 30 years old) that has no
equivalent available on CD.

Not a lot of an issue.

Furthermore, those records have become
moldy because they were stored in a high humidity area.
I cleaned those mold with tap water (also tried dish
detergent and rubbing alcohol

Just what IS rubbing alcohol, sounds poorly defined to me? - anyway, make
the wash a two stage event: first water + detergent, then water + a bit of
mild acid. You will not only get rid of calcium residue from the water or
from previous cleanings, you will also gain that the remaining water
releases its grip on the vinyl. Remaining water is then easy to wipe off
with a dab of pure isopropylic alcohol on a fluffy well washed, no magic
ingredients, towel.

Rubbing alcohol is 70% isopropanol with water, usually with some lanolin
added. The lanolin will leave deposits on records.

As Paul Stamler said, alcohol will leach plasticizers out of records, which
will cause microcracking on the surface and make the noise floor higher.
This is bad, so go easy with the alcohol. A 25% solution with soap in it
for a couple seconds on a record cleaning machine won't hurt anything, but
pure rubbing alcohol can. A microscopic inspection will tell you for sure.

If you DO have severe surface cracking, playing the records wet can help,
although it will make the cracking problems worse... once you play wet you
can never play the records dry again.
--scott

-- Whatever procedure and chemicals one might be using for vinyl
records washing, he ought to check the water temperature for every
step. Water temperature should be near, or equal to, the current
record, ie. vinyl temperature. I remember that I trashed one LP just
by soaking my old Watts Parostatik Disc Preener* with a strip of
alcohol, it cooled the Preener surface by evaporatig to such an extent
that the record instantly developed a very nasty bulge on that place
that was impossible to correct by any record flattening idea then, or
even today, known. Especially those thin, post oil crisis, records of
seventies are prone to deforming due temperature differences.

Edi Zubovic, Crikvenica, Croatia

* I still hand wash my records with that what's left of that Disc
Preener, bought in 1978. But recently I've obtained a pair NOS
Preeners at Ebay. Great! Sometimes Ebay works wonders. Maybe one could
find a NOS Cecil Watts Dust Bug too, who knows? -- C. Watts had great
record care products in the sixties/early seventies.
.

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