Statements do not necessarily accurately reflect what their authors know and
or believe, so take this with the grain of salt that the nanny statists do
not want us to consume ( btw I prefer unsalted foods):
quoting from the outside packaging of my small gaggle of never-cut 16"
aluminum base "Audiodisc" acetates:
"chemically permanent...nothing to dry out, no deterioration"
"long playing life..will playback hundreds of times"
I have a theory about why etching the glass or aluminum surfaces to assure
better adhesion MIGHTnot have proved to be constructive. In the context of
doing so might have precluded the "uniform, homogeneous coating...no
variation in depth..." that ostensibly resulted in "silent background...not
a whisper of needle scratch"
Reference was made to home recordings made on glass base disks. Consumers
could of course buy such blanks, but a significantly large % during their
first (early 40s) offering
were cardboard based.
During the approx. 40 years that I've been handling such disks, I've
observed that when held up to bright light, the coatings could be red or
blue. I don't recall seeing others but have
seen seemingly opaque coatings. And, different thicknesses of glass were
As was the case from lend-lease to 1945, the materials shortages of the
early 50s were
Art (Shiffy) Shifrin