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----- Original Message ----- 
From: "Roger and Allison Kulp" <[log in to unmask]>
> Some of those late 40s/early 50s promo 78s are literally on paper thin
vinyl.Can't recall if it was RCA or Columbia,that was the worst.
>
Probably RCA...who sold the "Dynaflex" LP's (which actually DID flex
readily, and weren't quite thin enough for translucency...?!)
The apparent assumption was that, since then-"modern" turntables
tracked at a gram or less...therefore, the LP's could be MUCH
thinner and still survive regular use...?! LP's later "slimmed
down" even further in the seventies...they were made from
petrochemical products, and all of a sudden the Ay-rabs turned
off the taps, creating the first "Oil Crisis"...!

It'll be interesting to see what happens in a decade or two,
when all the "gushers" begin to go "Drip, drip...drip...drip......
drip.........drip..................drip...dr..."

Steven C. Barr