Marcel Engels, (1964) made the degree of Engineer Chemical Technology at the Technical University of Eindhoven Netherlands before he started working for Sphinx Sanitary ware and Tiles in the Netherlands as head of Ceramic Technological Support in 1991. From 1997 on he was Project Manager Ceramics Department of the TNO-TPD Institute for Applied Physics Eindhoven Netherlands. Since 2002 he is Project Manager Silicate Ceramics at the Forschungsinstitut für Anorganische Werkstoffe – Glas/Keramik GmbH Höhr-Grenzhausen. Throughout his career he has, as Dutch delegate in the CEN/TC 67, been involved in development and application of tile standard tests, including slip resistance on ceramic tiles. As FGK project manager he is specialized in surface characterisation and slip testing, which was the basis for his participation in the SlipSTD Project.

Luca Emanueli works freelance and is the director of sealine (http://www.sealinelab.net), the research department centre at the University of Ferrara where he is lecturer in technology and design at the Faculty of Architecture. Invited to the 9th and 11th Venice Architecture Biennale. Since 2009 he has been working with Mario Lupano and Marco Navarra on the platform lo-fi architecture as curatorial practice as part of the programme of the Claudio Buziol Foundation in Venice.