Journal of The Society of Photographic Science and Technology of Japan
Online ISSN : 1884-5932
Print ISSN : 0369-5662
ISSN-L : 0369-5662
Volume 56, Issue 4
Displaying 1-9 of 9 articles from this issue
  • Hiroyuki KOBAYASHI, Yoshiaki TOYAMA, Shinichi MARUYAMA, Yusuke OKAWA, ...
    1993 Volume 56 Issue 4 Pages 259-263
    Published: August 25, 1993
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
    Dissolution of silver halides and diffusion of silver complexes in diffusion transfer precesses were investigated using an electrochemical model, in which a silver plate coated with AgCl emulsion was employed as a working electrode. The silver potential of the solution including thiosulfate as a fixing agent was more positive than that with thiocyanate, especially in the initial stage of the process. It was concluded that species reaching the development center were Ag (S2O3) - and Ag (SCN) 43-in the solution including thiosulfate and thiocyanate, respectively. The diffusion of thiosulfate ion and thiosulfate complexes was accelerated by additon of sulfite, whereas that of thiocyanate was little affected.
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  • Analysis on Surface Topography of Skin with Make-up
    Nobutoshi OJIMA, Hideaki HANEISHI, Yoichi MIYAKE
    1993 Volume 56 Issue 4 Pages 264-269
    Published: August 25, 1993
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
    Appearance of surface topography of skin with cosmetic foundation was analyzed by the introduction of image processing technique. First, it is shown that the surface skin component with tiny lines and pores can be separated from the body component by using the polarization of light.
    Secondly, on the basis of this experiment, three kind of facial skins; bare skin with lotion, skin with creamy foundation, and skin with both creamy foundation and face powder were taken by HDTV camera with polarized filter and those obtained images were analyzed and evaluated.
    The result indicates that the power spectrum of those images with a pass band of unit height from 10 to 40 lines/mm which correspond to the human visual response is well correlated to the subjective evaluation of skin with foundation.
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  • Akira HASEGAWA, Tomokazu IMURA, Hideo KUROKAWA, Takashige OMATSU, Iwao ...
    1993 Volume 56 Issue 4 Pages 270-275
    Published: August 25, 1993
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
    A cubic bromide emulsion was reduction sensitized at pAgs 5.6 and 7.3 and an octahedral silver bromide emulsion at pAg 8.9. The sensitizer used was SnCl2·2H2O. The sensitized cubic microcrystals showed an increase in microwave photoconductivity (MPC) at both pAgs while MPC decreased insensitized octahedral microcrystals. For the cubic microcrystals at pAg 7.3 the MPC increased with increasing sensitizer concentration until just before the appearance of fog. At pAg 5.6, however, MPC did not increase with increasing sensitizer concentration. With the octahedral microcrystals, increasing sensitizer concentration resulted in a corespondingly lower MPC. In both the cubic and octahedral emulsions, once fog appeared, MPC decreased to a lower value than in the unsensitized emulsion. These results are considered to be direct evidence for the production of both electron traps and hole traps by reduction sensitization.
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  • Takuji KANEDA
    1993 Volume 56 Issue 4 Pages 276
    Published: August 25, 1993
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
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  • Shigeru TAMAKI, Haruyuki TAKAHASHI, Masatoshi SAITO
    1993 Volume 56 Issue 4 Pages 277-286
    Published: August 25, 1993
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
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  • Tadao ISHII
    1993 Volume 56 Issue 4 Pages 287-295
    Published: August 25, 1993
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
    Why silver ions in the superionic α-AgI are highly mobile is reviewed and discussed, together with sublattice melting and low-energy excitation which are quite characteristic in superionic conductors, based on the quadrupolar deformability proposed by Fisher et al and Kleppmann-Weber's theory.Comparative understanding of silver-halides AgF, AgCI, AgBr and AgI is also made on the same basis.
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  • Takuji KANEDA
    1993 Volume 56 Issue 4 Pages 296-300
    Published: August 25, 1993
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
    A review is given on recent studies of behavior of photoelectrons and early stage of latent image formation in AgBr emulsion grains by microwave photoconductivity and Time-of-Flight measurements.
    1. The capture of photoelectrons by traps on the grain surfaces took place in several tens nanosecond, and the reaction of the captured electrons with interstitial silver ions took place in submicrosecond.
    2. The recombination of electrons with positive holes did not contribute to the decay of photoelectrons in several nanosecond to several tens microsecond.
    3. The mobility of electrons in the interior of the grains was much higher than that near grain surfaces, and rather close to that in large crystals.
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  • Yutaka KANEKO
    1993 Volume 56 Issue 4 Pages 301-308
    Published: August 25, 1993
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
    Over the last ten years, we have succeeded in the development of new generation color couplers, introduced in Konica Color papers. In 1984, the coupler, 2, 5-di-acylaminophenol, assured greater dye image stability under dark storage conditions in Konica Color PC Paper Type SR (Century Print). By 1991, new generation color couplers and image stabilizers were presented in Konica Color QA Paper Type A5 (QAA5) to provide excellent color reproduction and outstanding dye image stability. The dyes formed from these new generation couplers have superior spectral absorption, reducing the unwanted absorption, while maintaining dye image stability in dark storage conditions.
    Image stabilizing technology improves the light fasteness of a dye image by quenching the excited singlet oxygen and scavenging the radical species induced by light absorption. Of particular note is the synergistic light stabilizing effect, in combined usage with the singlet oxygen quencher and the radical scavenger, used to improve the light stability of magenta dye. This magenta dye, consequently, is formed from a new class magenta coupler, pyrazolotriazole. This new magenta coupler also provides the merit of reducing yellow stain.
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  • Taiji NISHIZAWA
    1993 Volume 56 Issue 4 Pages 309-317
    Published: August 25, 1993
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
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