Quote Originally Posted by AgX View Post
Primarily this would be a matter of subbing layer, which however could induce a chain of implications.

But Agfa produced in the past Agfapan films as well on acetate as on polyester (the S-versions).

Furthermore I don't get the point (I'm slow on the intake): why should a manufacturer coating on polyester switch back to acetate?
I can think of no good reason.