LifestyleMaking art with a 3-D penTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoLifestyle09/09/2018September 9, 2018Marc Bühren draws three-dimensional installations in the air with plastic threads from a 3-D pen. He has to work with speed and precision – the material hardens in just a few seconds.https://p.dw.com/p/342yDAdvertisement