Leslie Lazenby in an email covering other matters commented:
By the way I tested it [Rondinax 35U] with a film made in the Ukraine, Svema 200, it is ultra thin and an ultra strong polyester base. It was a bit harder for the cutting blade to go through but it did it without issue. It was also mentioned you could load the reel while wet or damp. Oh my gosh I loaded one right after the other without time to dry. Perfect every time, without one hiccup. I love this tank.