Gramma hunt is totally correct about the Sharpie pens. They are not meant for fabrics. I have a shirt thst has NASCAR drivers’ autographs on it and there is a yellow halo around the the autographs. I don’t mind it on the shirt but I would hate it on a quilt. I’ve used Pigma Micron pens and also (believe it or not) the gel pens - I tested the gel pens on fabric bu washing, scrubbing and other ways and nothing happened at all.