The purple trace of the marker disappears within 1 to 4 hours, depending on the material. You can also remove traces with a damp cloth or rinse.
Used for marking the fabric in sewing and needlework (quilting, embroidering, patchwork, etc.). Before you start, you need to test the marker on a small piece of cloth. Do not wash or iron the fabric until the marker disappears, since exposure to heat can make them resistant.