MattSparkes writes: "A revolutionary way to print pictures without ink has been invented by a US company called Zink Imaging. The company, a spin-off of Polaroid, says it will use the technology to make hand-held printers that can be integrated into mobile phones and digital cameras. "The key to creating the devices is doing away with ink, using a new type of digital printing that changes colour of paper when heat is applied.""
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