Dual Purpose Marking Pens, Mark-B-Gone & Disappearing Ink, 12 pcThis Dritz Dual Purpose Marking Pen features a Blue Mark B Gone Pen on one end and a Purple Disappearing Ink Pen on the other. Use this pen to transfer pattern markings for sewing, quilting and needle crafts and for use with other projects that require marking. The blue ink wipes off with a damp cloth while the purple ink is air and water soluble. Features a Blue Mark B Gone Pen on one end and a Purple Disappearing Ink Pen on the other Blue ink is