Inkjet 3D printing is a unique technology for the digital manufacturing of multi-material objects with high resolution and high productivity. By combining different print heads in one single print job, complex objects composed of several interwoven materials having each a different physical (mechanical, optical, electrical…), chemical or biological property can be manufactured. This allows the design of objects with unique properties for applications in various fields such as optics, automotive and bio-medical devices (micro-reactors and lab-on-a-chip).