Optically active materials and devices can be found in a wide range of energy, environmental and healthcare applications, including semiconductors, photovoltaics, catalysts, sensors and more. To foster an eco-designed manufacturing strategy for the production of these optically active systems with low energy consumption, it is essential to promote the processing of aqueous functional fluids incorporating highly efficient particles, in order to propose a complete architecture printing approach. In that purpose, the National ANR project EC-LIPSE (2025-2029, coordinated by Aurore Denneulin) proposes to address the eco-design and development of innovative sustainable methods for the fabrication of e?cient optically active systems (with a ?rst concrete focus on electrochromic devices (ECDs)).