Letter | Published:

Position of Maximum Optical Sensitivity of Sensitized Photographic Plates

Naturevolume 140pages197198 (1937) | Download Citation



IN one of the first papers1 on the phenomenon of sensitization of photographic plates to the long-wave rays of the spectrum by dyestuffs, Vogel noted that the maximum sensitivity is often shifted by several hundred Angstrom units towards the red in comparison with the maximum absorption of the dye-stuffs in solution. The usually accepted explanation2 of this phenomenon is that it is due to the displacement of the maximum of absorption of the dye-stuff by its adsorption on the silver halide. But on account of the difficulties connected with measuring the absorption by scattering media, this hypothesis has not yet been confirmed experimentally.

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  1. 1

    Vogel, H., Ber. deut. chem. Ges., 7, 976 (1874).

  2. 2

    Bonhoeffer, K., and Harteck, P., “Grundlagen der Photochemie” (Dresden und Leipzig: Th. Steinkopff, 1933), p. 278.

  3. 3

    de Boer, J. H., Z. physik. Chem., B, 15, 281 (1932).

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  1. Cine-Photo-Research Institute, Karpov Institute of Physical Chemistry, Moscow



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