Use to transfer pattern markings - needlecraft and quilting designs. Use disappearing ink on projects to be completed within 24 hours. For best results - use on washable fabric. Not recommended for dry clean only fabrics. Store pen with cap on and point facing downward. Purple disappearing ink normally disappears in 48-72 hours. Some fiber contents, fabric finishes or dyes (red and pink in particular) may not be suitable for use with this pen. To remove marks, rub gently with clean damp cloth well moistened with plain water. Purple/Blue. 1pc.