I've been using regular cheap printer paper for paper piecing for years- works fine. I do shorten my stitch length to about 18 stitches per inch- paper removes easily. If you need multiple copies of your pattern (. Making multiple blocks) save the blocks to a program that lets you manipulate them, format them to put 4 on a page, adjusting margins-- just make sure they copy to the correct size. Or, make 4 copies, cut them out, tape the 4 to a sheet of paper and use it as your master to make multiples.