There is a type of paper you can leave in, it feels like paper but when washed turns to tissue thin poly fabric. Also there is paper that will dissolve in water for paper piecing. I use vellum. It works the best for me and easy to remove. Newsprint is good. Any paper that will go through a printer is what you need to try. I use waxed deli paper for foundation piecing because it comes pre cut in in the size I like to use. Foundation piecing does not have a pattern on the paper to follow. Usually used for strip piecing making string blocks.