Scientists develop new self-erasing ink Today’s Video of the Day comes from the Technical University Munich (TUM) where researchers have developed a new self-erasing ink. What makes this ink special is that the supramolecular materials inside the material can disintegrate at a predetermined time.
The self-erasing inkjet ink is water based. The ink itself is essentially an acid-base indicator, also commonly called a pH indicator. The indicator used currently is thymolphthalein, which is blue when the pH is high and colorless when the pH is neutral or low. The ink contains a base to raise the pH so the ink is initially blue when printed.
By Rory Arnold, Earth.com Staff Writer
Video Credit: Boekhoven Lab / TUM