3D printing can produce highly complex shapes. But printing ceramic objects with the help of a laser is a more difficult challenge. Now researchers at the Paul Scherrer Institute PSI have for the first time taken tomograms revealing what happens at microscopic level during this fabrication process. The findings will help improve this very promising technology.3D printing can produce highly complex shapes. But printing ceramic objects with the help of a laser is a more difficult challenge. Now researchers at the Paul Scherrer Institute PSI have for the first time taken tomograms revealing what happens at microscopic level during this fabrication process. The findings will help improve this very promising technology.