Don’t know the answer to the OP, but since this thread has come up again, here’s an interesting factoid that maybe not everyone knows yet:
This stuff is also used to attach a plastic card to paper – when you get a bank ATM card, or credit card, or store charge card, or plastic card from your HMO, whatever – it’s attached to a piece of paper this way.
It wasn’t always thus. I don’t remember when this changed, but it was within my mid-recent memory, I think.
How it used to be: The paper had some carefully shaped holes in it, positioned at two diagonally opposite corners of the card. The card was placed on the paper there, and the corners poked through those holes. This held the card in place.
At the very bottom of the piece of paper, was a message in quite small type, declaring that something on the page (not clearly specified what) was either Copyright or Trademark (I forget which already) by. . . wait for it . . .
. . . Dianetics ! :smack:
What I had sometimes heard (or was it just an urban legend?) was that Dianetics held the trademark (or copyright or whatever) for the invention of those little holes in just that pattern, for just that purpose. (Sounds like that would have been a trademark, not a copyright.) Or so I had occasionally heard.
So it seems that Dianetics had somehow invented that idea, or otherwise come to control the rights, so that every company that sent out plastic wallet-sized cards had to pay them a royalty or licensing fee or something.
Then, all of a sudden, they all started using this rubbery gluey stuff instead. So I thought, that particular formulation must have been a new invention about then, just for the purpose of not having to kiss Dianetics ass with tribute payments any longer.