Dr. Isabelle Druc is specialized in Andean archaeology, ceramic studies, archaeometry, petrography, and ethnoarchaeology. She focuses on ancient technologies, traditional productions, and communities of practice, socio-cultural and economic interactions. I. Druc is involved in archaeological, ethnoarchaeological and ceramic projects worldwide, has published more than 40 articles and 10 books and has produced some 200 documentaries and video interviews related to ceramics, traditional arts, culture, and language learning. Dr. Bruce Velde is a very well-known clay mineralogist, with many books and articles to his credit. He has taught and conducted research in the USA and France, where he is established wince many years. His interest in ancient ceramics has lead him to help many students in their studies of ceramics.