1. Drawings of water erasable pen can keep for a long time. Ink is nontoxic. 2. Ink of water erasable pen be easily and completely removed with water, damp cloth or sponge. 3. Blue and White colors offered, and several nib sizes available. 4. White Marker's drawings need a few seconds to come out distinctly after writing. 5. Write on paper, cloth, wool, wood, and plastic etc. 6. Used for art and fashion design, handicraft, embroidery, and home works etc. 7. To ASTMF963&EN71PART3.