The pressing sheet is also useful for appliques that have multiple piece that are layered. You can press them together then remove from the pressing sheet and iron on to your back ground fabric (hope all that made sense). I bought my sheet at JoAnns long ago w/a coupon (or sale) and really like having it. Mine is a Fons and Porter. Parchment paper is not that cheap so if you plan to do a lot of applique you might as well invest in the pressing sheet. But not mandatory
