A new method for printing on paper using light promises to be much cheaper, and easier on the environment than the traditional ink-based printing we’re used to.
Scientists have developed a special nanoparticle coating that’s easy to apply to normal paper and changes colour when ultraviolet (UV) light shines on it. The colour change can be reversed when the coating is heated to 120 degrees Celsius (248 degrees Fahrenheit), and allows for up to 80 rewrites.
The team of researchers from the US and China say that their new high-resolution light printing technique could be used everywhere from newspapers to labels, saving on the cost of ink and paper, and on the environmental cost of their recycling and disposing.
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