Inkless Paper?

Researchers from Shandong University in China, the University of California, Riverside and Lawrence Berkeley National Laboratory recently published a study detailing the invention of light-printable, rewritable paper.

“The greatest significance of our work is the development of a new class of solid-state photo-reversible color-switching system to produce an ink-free light-printable rewritable paper that has the same feel and appearance as conventional paper, but can be printed and erased repeatedly without the need for additional ink,” explains Yadong Yin, professor of chemistry at the University of California, Riverside. “Our work is believed to have enormous economic and environmental merits to modern society.”

Why not just use recycled paper, you might ask? As explains, the chemicals used in paper production are a leading source of industrial pollution, and abandoned paper makes up about 40 percent of the contents of landfills. Recycled paper contributes to the pollution problem through the process of ink removal. Add to that problems around deforestation, and the case for minimizing paper usage is a strong one.

Researchers invent paper that can be printed with light and reused 80 times [Inhabitat]

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