My quilt guild has a stash of fabric that was donated and someone sent a bolt of a very light green flimsy fabric.....100% cotton but not something you would use in the quilt top. We cut it up into 2 yard pieces, washed and pressed it and sliced it up to use as the foundation in scrappy strip quilts. It worked beautifully. If it had been one or two shades darker, we probably couldn't have used it.