Disappearing or Invisible Ink is always a fun, funny, life of the party, prank toy for any party! Disappearing ink is a dark blue water-based solution which, when squirted on clothing, table cloths, or other materials, will disappear within minutes leaving only a colorless wet spot that will evaporate slowly. Disappearing ink is a very dilute alkaline solution. Although it is not harmful in small quantities, it should be rinsed from the skin with water in the event of contact. The Disappearing Ink comes in a 60 ml plastic bottle with a spray nozzle for ease of use. It is so convenient to bring along with you to any party.