I used to use regular 20wt printer paper to copy my paper piecing designs until a fellow quild member told me about children's Doodle Pads. You can get them in places like Michael's Craft stores and they are about $2.99 a pad of 60 sheets. They are 9" x 12", so you need to cut them down to 8 1/2" x 11". I do a whole pad at the same time and then I have them ready when I need them. Putting water on the seam might make the ink from the printer run, so be careful if you do that.