Underwater writing technique allows you to draw patterns in liquids

Writing on solid materials, such as parchment or paper, is possible because the ink bonds to the surface and remains intact. But in a liquid, the particles are constantly moving and the ink disperses quickly – until now.

Thomas Palberg of Johannes Gutenberg University Mainz in Germany and his colleagues used a resin bead for drawing lines and patterns in water containing ink particles. It works because the pearl produces paths of low acidity through the water which attract the ink.

To move the bead along specific…