Debra Hess Norris (she/her), Chair Department of Art Conservation, University of Delaware (UD), and Director, the Winterthur/UD Program in Art Conservation since 1997, has authored 45 articles/ book chapters on photographic materials preservation, led preservation initiatives and 160+ workshops worldwide from China to Cuba. She is honored to serve on many national boards and advisory councils. Norris was named a Francis Alison Scholar, UD’s top faculty honor, among treasured awards from the American Institute for Conservation and Heritage Preservation. She has served in many academic leadership positions at UD. (Wilmington, Delaware, USA). Nora W. Kennedy (she/her) is the Sherman Fairchild Conservator in Charge of the Photograph Conservation Department at The Metropolitan Museum of Art, devoted to the conservation of The Met’s photographs, bound volumes, and its time-based media collections. Kennedy is an adjunct faculty member of New York University’s Institute of Fine Arts’ Conservation Center. She has collaborated internationally with conservation colleagues from around the world on numerous initiatives. Kennedy received an MS in art conservation specializing in photographic materials from the Winterthur/University of Delaware Art Conservation. She was awarded a doctor honoris causa from the Academy of Fine Arts and Design, Bratislava, Slovakia. She is a recipient of the University of Delaware Presidential Citation for Outstanding Achievement, the AIC’s Sheldon and Carolyn Keck Award, and the Hewlett Packard Image Permanence Award. Bertrand Lavédrine (he/him) holds a Master degree in chemistry and a PhD in Art and Archeology from Paris Sorbonne University. He is professor at the National Museum of Natural History, Paris, France. He was director of the Centre de Recherche sur la Conservation (1998-2019) and head of the conservation-training programme at the University of Sorbonne (2002-2007). Bertrand Lavédrine had received the European prize for innovation, the Kraszna-Krauz Photography Book award and he is Knighthood in the Order of Arts and Letters of France.