The best pen I found that works is the Frixion made by Pilot, it disapear like magic when you put a hot iron on it. You can get them at Office Max or Walgreens. I found them once at Wal Mart, but can't fine them any more. I been looking for a white one but no luck as of yet. They come in blue, black, red, orange, and pink. You can also get them of the internet, just google Frixion. Hopes this helps. I messed up one of my quilts because I couldn't get red markings out.