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melanotype

melanotype
  (mɪˈlænətaɪp)
  Also incorrectly meˈlainotype.
  [f. melano- + -type.]
  A kind of ferrotype: see ferrotype 2.

1864 Webster, Melanotype. 1867 Sutton & Dawson Dict. Photogr., Melainotype. This positive process is of American origin. 1890 Anthony's Photogr. Bull. III. 302 These tin or melainotypes were taken everywhere. 1892 Woodbury Encycl. Photogr., Melainotype, or Melanotype.

Oxford English Dictionary

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