In a message dated 3/3/2005 8:34:40 AM Eastern Standard Time, [log in to unmask] writes: Since SSS has happened, we've been told that it was just coincidental that back coating and the "bad" binder formulation happened at the same time. ************ I was told by one tape manufacturer back in the 70s that their back coating was essentially the same as the active coating, just less controlled and with a different finishing operation. Therefore it would contribute to the SSS problem. Mike Csontos