Like any ordinary printer, this machine ingests a blank page and spits it out covered in print. But instead of ink, it uses only water, and the used paper fades back to white within a day, enabling it ...

Most people are quite familiar with ink-jet printing. But a team of chemists from northeast China's Jilin University has recently attracted worldwide attention by inventing a water-jet printer. Like ...

Researchers have developed a rewriteable paper coating that can encrypt secret information with relatively low-tech invisible ink -- water. A message printed out by a water-jet printer on a ...