Edmond Becquerel的光致变色图像的复制和着色研究
Replication and study of the colouration of Edmond Becquerel's photochromatic images
摘要：
埃德蒙·贝克勒尔制作光致变色图像的过程，这是第一张彩色照片，仍然知之甚少。特别是，这些图像的颜色来源引起了长期的争论，从1848年贝克勒尔的出版开始，直到19世纪末。在实验室中复制了这一摄影过程，并通过可见光谱研究了感光板的着色。一个全面的描述的敏化路线，改编自贝克勒尔的写作。曝光步骤的研究使我们能够深入了解敏化板的着色机制，并在光谱灵敏度和颜色忠实性方面比较贝克勒尔开发的两种敏化途径。所谓的“电化学敏化”样品被发现是更敏感，并达到一个更大的色空间比“浸渍敏化”的。最后，一个可重复的方式创建彩色样品的建议。
英文摘要：
Edmond Becquerel's process of making photochromatic images, which are the first colours photographs, is still poorly understood. In particular, the origin of the colours of these images gave rise to a long-lasting debate, starting from the publication of Becquerel in 1848 until the end of the 19th century. This photographic process was replicated in the laboratory, and the colouration of the sensitized plates was studied by means of visible spectroscopy. A comprehensive description of the sensitization routes that were adapted from Becquerel's writing is given. The study of the exposition step allowed us to gain insights in the colouration mechanisms of the sensitized plates, and to compare between the two sensitization routes developed by Becquerel in terms of spectral sensitivity and colour faithfulness. The so-called "electrochemically sensitized" samples were found to be more sensitive and to reach a larger chromatic space than the "immersion-sensitized" ones. Finally, a reproducible way of creating coloured samples is suggested.
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