Abstract
RECENTLY we have had occasion to make thin films of celluloid by the previously known method of dissolving the celluloid in amyl acetate and allowing a single drop of the solution to fall on a clean water surface. With solutions sufficiently dilute, as the amyl acetate evaporates interference colours appear in practically uniform sheets of colour over the entire surface which change from red to violet and then the film becomes colourless. Some of these films were deposited on optically flat glass and their thickness determined by an interferometer method by C. G. Peters, of the Bureau of Standards' staff.
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BARTON, V., HUNT, F. Molecular Dimensions of Celluloid. Nature 114, 861 (1924). https://doi.org/10.1038/114861a0
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DOI: https://doi.org/10.1038/114861a0
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