Cotte Marine, Fabris Tiphaine, Langlois Juliette, Bellot-Gurlet Ludovic, Ploye Françoise, Coural Natalie, Boust Clotilde, Gandolfo Jean-Paul, Galifot Thomas, Susini Jean
Experiment Division, European Synchrotron Radiation Facility (ESRF), Avenue des Martyrs 71, 38000, Grenoble, France.
LAMS, UMR 8220, UPMC/CNRS, Sorbonne Universités, place Jussieu 4, 75005, Paris, France.
Angew Chem Int Ed Engl. 2018 Jun 18;57(25):7364-7368. doi: 10.1002/anie.201712617. Epub 2018 Mar 20.
Louis Ducos du Huron (1837-1920) dedicated his entire life to the elaboration of physical-chemical processes for color photography. This study aimed at highlighting his unique contribution to three-color printing through 1) an in-depth review of the many protocols he published and 2) the synchrotron-based IR and X-ray microanalysis of fragments sampled in three artworks. Ducos du Hauron's method relied on the preparation and assembly of three monochromes (red, blue, yellow). This study brings to light complex multistep recipes based on photochemistry (carbon print), organic, and inorganic chemistry. The various ingredients involved (e.g., pigments, dichromate gelatin, collodion, resin) were identified and localized through their spectroscopic signature, confirming the relevance of synchrotron spectromicroscopy for the characterization of historical photographs. The impressive correlation between texts and chemical analyses calls for a wider application to the history of photography.
路易·迪科斯·迪于伦（1837 - 1920）一生都致力于彩色摄影物理化学过程的研究。本研究旨在通过以下方式突出他对三色印刷的独特贡献：1）深入回顾他发表的众多方法；2）对三件艺术品中取样的碎片进行基于同步加速器的红外和X射线微分析。迪科斯·迪于伦的方法依赖于三种单色版（红、蓝、黄）的制备和组装。本研究揭示了基于光化学（碳素印相）、有机化学和无机化学的复杂多步骤配方。通过光谱特征识别并定位了所涉及的各种成分（如颜料、重铬酸盐明胶、火棉胶、树脂），证实了同步加速器光谱显微镜在历史照片表征方面的相关性。文本与化学分析之间令人印象深刻的相关性要求将其更广泛地应用于摄影史研究。
