Magic Disappearing Ink ( Set of two bottles ). DESCRIPTION The reactions you will get with this prank are awesome, squirt a little Invisible Ink on someone, watch them have a huge reaction, and laugh as the stain completely disappears. Some great acid-base chemistry behind all of the prankster fun. Disappearing ink is a surprisingly very educational product. The perfect introduction for an acid base topic. Disappearing Ink. We supply you two bottles of1 oz. each of the ink. No instructions . Great Joke or Magic Trick. Rs.249/- SEE DEMO THE LINK........... https://www.youtube.com/watch?v=p0dNWEGxkKc