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Single-laser tech prints color graphics on metal

Although it’s already possible to create colored images on metal surfaces using lasers, different types of lasers have to be used for different effects. Now, however, Russian scientists have developed a method of producing multiple effects using one commercially-available laser.

Led by Galina Odintsova, researchers at Saint Petersburg’s ITMO University were able to change the “processing parameters” of the laser, allowing them to control how much it heats a metal surface over a wide temperature range. This, in turn, makes it possible to produce color images in three ways. None of the techniques are particularly time-consuming, and all can be used to create large or small images. [Source]

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