Dritz Magic Marking Chalk / Disappearing Tailor's Chalk 663 Dritz Magic Marking Chalk / Disappearing Tailor's Chalk 663 Easy to use and efficient, the Dritz Magic Marking Chalk is a popular marking accessory used by tailors, and general quilters. Great for applying markings and measurements, this magic marking chalk is specially formulated so that the markings disappear in 2 to 3 days. If you wish to eliminate the markings immediately, you can use a preheated iron that has been set at a suitable temperature to iron over the marks. Includes two pieces Magic Marking Chalk disappears in 2 to 3 days