Description
Pink pen: 1-7 days disappear, or use water to wipe them off immediately..Purple pen: 2 to 14 days automatically fade or use water to wipe them off.Blue pen : writing trace does not disappear automatically, but it can easily and quickly erasable by water.Green pen : Automatically disappear, or quickly erasable by water.Can write on any surface, especially use for dress marking, shoe marking, handicraft, embroidery, cross stitch, patchwork, needlework and artificial flowers, etc.