Acknowledgements

we would like to thank to:

• Mark Jacobs: private collector who directly initiated our project by noticing Finlay color negative scans in the collection of Library of Congress. Without his expertise and generous donation of Finlay taking filters this project would never be possible. Mark Jacobs passed away in 2022 and we miss him.
• Doug Peterson a Kenzie Klaeser, Digital Transitions: For letting us to work with scans made using DT Atom, a digitization device based on high-end PhaseOne camera.
• Bertrand Lavedrine, Muséum National d'Histoire Naturell: For several consultations on color dyes and other aspects of early color photography
• Kendra Meyer, National Museum of Natural History: For discovering Paget plates at the National Museum of American History and scanning examples for us.
• Sara Manco, National Geographic Society: For collaboration on stitching and color reconstructions of scans at the National Geographic Society
• Geoffrey Barker, Scott Wajon, Russell Perkings, State Library of New South Wales: For collaboration on color reconstruction of Frank Hurley's photographs and the State Library of New South Wales
• Lynn Brooks, Micah Messenheimer, Phil Mitchell, Helena Zinkham, Thomas Rieger, Library of Congress: For kind collaboration on color reconstructions of the American Colony
• Alain Schiebli: For discussions on digitizing autochromes back in 2007
• Ladislav Bezděk, Martin Frouz, Národní památkový ústav: For work on the first publication
• Victor Gerasimov: For scans of Paget plates from Bulgaria
• Gorgio Trumpy: For sharing an expertise as well as data on dyes of Dufaycolor and autochorme
• Luisa Casella: For useful discussion about permanence of Autochrome and the restoration of color dyes