"Invisible" reusable labels are written and read using light

Currently, package labels contain certain information – such as barcodes, serial numbers or buyers' addresses – that would be best left unseen by wrongdoers. Newly-developed rewritable labels could address that issue, as they're blank and transparent unless exposed to a certain type of light.

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Category: Science

Tags:

• Dresden University of Technology
• Light
• Ultraviolet

from New Atlas (Gizmag) http://bit.ly/2MOJYHt