Investigation, characterization and optimization of 3D printing materials for variable area flowmeters, derivation of recommendations for the relevant printing standard(s) and development of a suitable test method for this purpose. As part of a ZIM cooperation project funded by the German Federal Ministry for Economic Affairs and Energy (BMWi), "Central Innovation Program for SMEs", components from the 3D printer are being investigated at the Tübingen site with regard to their mechanical and structural properties. The initial focus here is on anisotropies, i.e. directional dependencies of properties, which could result from the different printing processes. In addition to mechanical load tests of the printed components (such as bending tests, heat deflection temperature or creep tests) and structural analysis methods (such as X-ray diffraction, IR and Raman spectroscopy), further investigations are also carried out on materials aged in the laboratory in order to investigate this influence on the structure and mechanical properties of different materials.