Super hydrophilicity test using ARC-FLASH

fig 1

The left half is treated with ARC-FLASH, and the right half is untreated.
The surface was exposed to black light, and water was sprayed on it. The material is black acrylic board.
The treated surface is water repellent. Although it looks like nothing is there in the photo, the entire surface is covered with a film of water, whereas water beads on the untreated surface.