Abstract
February 26, 1781.—The pigment known as ‘Turner's Yellow’ or ‘Patent Yellow’ was the subject of a patent granted to James Turner on Feb. 26, 1781, and was at one time extensively used. The validity of the patent was twice upheld in the courts and its life was extended by Act of Parliament (32 Geo. 3, c. 73) on the ground that “the colour was made from British materials, and that the invention has not only in a great measure superseded the necessity of importing the colour from abroad, but it is now exported in considerable quantities to most parts of Europe, the East and West Indies, and America, … and by the great consumption of common salt necessarily used in preparing the same the said invention will afford an increase to the public revenue.” Like most lead paints, however, ‘Turner's Yellow’ is affected by long exposure to a sulphurous atmosphere, and the introduction of the chrome colours has rendered it obsolete.
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Calendar of Patent Records. Nature 123, 300 (1929). https://doi.org/10.1038/123300a0
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DOI: https://doi.org/10.1038/123300a0