Probably due to the unmodified laminator I used. I had to run the board through 5 or 6 times to get good transfer to the board. Even with rotating the board between passes, I usually had holes on end shifted over about a half pad or more. I also had to run the board through 3 times to preheat before applying the transfer pattern. Total time involved is about the same as when I used the laminator. Also I had to use a genuine Brother cartridge, could not get good transfer with generic cartridges. With the cold method I have not had any problems with either type. DuWayne