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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 44, Iss. 9 — Sep. 1, 1954
  • pp: 699–702

Experimental Photographic Systems Based on Phosphotungstic Acid

LYMAN CHALKLEY  »View Author Affiliations

JOSA, Vol. 44, Issue 9, pp. 699-702 (1954)

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The heteropolytungstic acids, especially certain of the phosphotungstic and silicotungstic acids, are photooxidizing agents with properties that suggest their use in photographic processes. The chemical and physical properties of the substances are described, and simple demonstrations of three new photographic processes based upon phosphotungstic acid are outlined. These comprise a printing out process producing images in pigments of basic dyes; phototropic, and therefore reusable, printing out materials; and the development of a latent image.

LYMAN CHALKLEY, "Experimental Photographic Systems Based on Phosphotungstic Acid," J. Opt. Soc. Am. 44, 699-702 (1954)

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  1. P. E. Liesegang, Phot. Archiv. 6, 152 (1865); 34, 180 (1893).
  2. J. de Ruiter, French Pat. No. 380,502 (1907).
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  7. The nomenclature used here for the phosphotungstic acids is based on the formulation of J. F. Keggin, Proc. Roy. Soc. (London) 144, 75 (1934). In this system the 12 series designates the most familiar phosphotungstic acid. It is the reagent chemical sold as phosphotungstic acid by Merck & Company, Rahway, New Jersey, and by the Eastman Kodak Company, Rochester, New York. Further background information on the phosphotungstic acids may be found in Gmelins Handbuch der anorganischen Chemie 54 (Verlag Chemie, Berlin, 1933), eighth edition.
  8. L. Chalkley, J. Phys. Chem. 56, 1084 (1952).
  9. L. Chalkley (unpublished work).
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  11. Oscar Gros, Z. physik. Chem. 37, 157 (1901); French Pat. No. 310,084 (1901).
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  15. The method of physical development used here is essentially one of the A. F. Odell procedures as described by S. T. Dutzu, Leica Phot. 8, No. 5, 12 (May, 1939).

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