Inkjet printing is nowadays a standard technology in every home, but due to its capabilities concerning the deposition of various materials onto substrates other than expensive paper coated with microporous layers, there is still a great potential to be explored. Goals are to reduce printing costs and ecological damage by using water-based inks and cheap compatible substrates such as uncoated recycled and plain paper. The project will improve our understanding of the interaction of ink with the substrate by using novel experimental and modelling techniques on multiple scales. The developed tools will allow to optimize printing techniques and -products. Next to inkjet printing, the outcome of the project will have relevance for other applications involving multiphase fluid flow in porous media, enhanced oil recovery, transport in biological tissues, or food processing.