from The Century Dictionary.

  • noun A hypothetical compound of platinum monoxid with the oxid of a more basic or electropositive metal. No such compound has actually been obtained in a definite form.
  • noun An alloy of steel with forty to fifty per cent. of nickel, used to replace the metallic filaments of platinum or electric incandescent or glow-lamp bulbs. It has so nearly the same coefficient of expansion as that of glass that difficulties are avoided which occur when a more expansive metal is to be sealed into glass. Used particularly in France.


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  • To dispense with this preliminary sizing Captain Pizzighelli adds gum arabic to the platinite solution, whereby the sizing and sensitizing are done in one operation.

    Photographic Reproduction Processes

  • They are generally due to metallic dust in the paste of the paper, or from particles of undissolved salt in the platinite solution.

    Photographic Reproduction Processes

  • The developer consists of oxalate of potash and potassic chloro-platinite -- about thirty grains of the platinum salt to half an ounce of oxalate forming about six ounces of solution; a great many variations, however, may be made in the proportions of platinum salt and oxalate, and different effects secured.

    Scientific American Supplement, No. 711, August 17, 1889


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