Clover Iron Chaco Pen This set includes one pen body and one refill (1). ★Key Features★ ・The ink appears white, making marks visible even on black or dark-colored fabrics. ・Marks disappear with ironing or washing. ★Mini-Knowledge★ ＜Why does it appear white?＞ The white ink of the Iron Chaco Pen contains wax particles mixed in water. When drawn on fabric, the water evaporates, leaving only the wax particles, which appear white due to their light-reflecting properties. It takes a few seconds for the mark to appear white because the water needs time to evaporate. ＜Why does it disappear with ironing?＞ The wax particles are spherical, which is why they reflect light. Ironing flattens the particles, preventing them from reflecting light. The wax remains on the fabric, but in such a small amount that it's not a problem. By the way, the marks disappear with washing because the wax particles are washed away. ■Country of Origin: Japan ■Materials/Components: Ink: Wax, water, and other components. Body: Polypropylene Cap: Polypropylene