An hour later you come back to the bar for another beer, and you see that the moisture has dried, leaving a swollen ring on the coaster. Print curl is what you get when you unroll an image and it wants to roll itself back up again. Print curl happens when one side of an encapsulated image changes size out of proportion to the other side, causing the print to curl towards the smaller side. This can be caused if the user puts a heavy laminate, say 10 mil glossy, on the top side, and something thin and cheap on the back, but doesn't adjust the tension to allow for the different dimensional stabilities of both types of film. For instance, if he applies the same tension to both the top and bottom film, the bottom film will likely stretch more than the top, since it's weaker.
Boat wake is caused by several things.
For example, if you're trying to encapsulate something thick, the edges of the film hanging off the sides of the print will not get as much pressure, so they'll drag behind, causing the ripple pattern. If your rollers get gummed up, they simply won't work as well. Or if you get pieces of loose paper stuck to the rollers, you'll probably be able to see an outline of that paper every time that spot hits the image. Make sure the power is off before you start. If there is adhesive on a heat shoe, you can wipe it off while the shoe is hot with a clean, dry cloth.