State-of-the-art measurement technologies, artificial intelligence, and a strong network of partners are the key ingredients of the SpecReK project, led by Basf with support from the German Federal Ministry of Education and Research (BMBF). In collaboration with Endress+Hauser, TechnoCompound, and the Universities of Bayreuth and Jena, the project aims to significantly improve the mechanical recycling of plastics, thus strengthening the circular economy.