Magic Ink Pen - Disappearing Ink Pen for Fabric
For use on all different types of fabric. The pen has a fine tip and a thicker tip (one on either end), both making a purple line on your fabric, quite clear enough to see where to cut once you have measured or transferred a pattern shape. The line disappears within a couple of hours, depending on nature of fabric. If it doesn't you can remove it with a baby wipe or damp cloth.