Abstract
THE interesting observation recorded by Dr. C. J. Smithells in Nature of July 26 is not new. During the course of a long series of experiments on ‘metal colouring’ at the Birmingham Technical College about thirty years ago, it was found that copper articles, which had been coloured by immersion in a hot solution of cupric chloride, blackened rapidly on exposure to light. I made a number of attempts to fix photographic prints obtained from ordinary negatives by this process, but in every case the image itself suffered from attack by the reagents used.
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BAKER, T. Photography on Copper. Nature 126, 279 (1930). https://doi.org/10.1038/126279d0
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DOI: https://doi.org/10.1038/126279d0
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