Flanders Hydraulics Research (Waterbouwkundig Laboratorium) is a research centre that makes frequent use of scale models and is looking for a new way to make them that is more efficient, flexible and sustainable than the current masonry-based approach. This will involve using an alternative material and a different production method. Firstly, a materials study was needed. For this, the Innovative Public Procurement Program (PIO) helped the research centre to call on the expertise of Sirris.