German China
The laser printing technique: by printing copper and gold in turn, the gold helix initially is surrounded by a copper box. Etching the copper away, results in a free standing helix of pure gold. (University of Twente)
The Netherlands: 3D Printing

Printing Pure Gold Microparts

Thanks to a laser technique that ejects ultra-tiny droplets of metal, it is now possible to print 3D metal structures, not only simple ‘piles’ of droplets, but complex overhanging structures as well: like a helix of some microns in size, made of pure gold. Using this technique, it will be possible to print new 3D micro components for electronics or photonics.

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