Single-laser techniques make reproducible artwork on metal without dye or paint
(PHYSorg.com Physics)

A variety of laser-based techniques can be used to produce colorful artwork on metals. However, each approach typically requires a different type of laser and very specific settings. In a new study, researchers describe how to use a single commercially available laser to achieve three techniques for laser colorization on metal, making the techniques more practical for a wide range of applications in art and jewelry making, with the possibility of mass production.