The Palo Alto Research Center (PARC) and the Xerox Research Centre of Canada are teaming up to test an innovative type of erasable paper and a complementary printer that produce documents that disappear after 16 to 24 hours.

This type of erasable paper, also known as a transient document, is exactly like regular printer paper but coated with photosensitive chemicals that change color when exposed to light.

The printer prints by exposing the paper to a UVB light source. Images remain on the erasable paper for eight hours before progressively fading away. Running the paper through the printer will also erase the current image, as heat is applied in the printer, which stimulates the erasing process.

Researchers are also developing a pen that writes on the erasable paper by using an internal light source.

The new experimental printing technology eliminates the need for ink and toners, which contribute significantly to reduce printing costs. However, the biggest impact will be the benefit to the environment since it could lead to significant reduction in paper and energy use.

The paper and printer could be out in the market in the next few years.