Tsuyoshi and all,
Originally Posted by Shinnya
As far as I'm concerned the problem with cutting paper with a Rotatrimmer and black spots is just a myth. I've been using one for years and never experienced the problem.
As for cutting large sheets there are several options which people have already mentioned. There is also a plexiglass riping ruler that you can find online that will produce neat deckle edges by tearling the paper. I don't have one but a friend of mine locally owns one and so does Dan Burkholder's wife Jill. They both swear by the tool.