Journal of The Society of Photographic Science and Technology of Japan
Online ISSN : 1884-5932
Print ISSN : 0369-5662
ISSN-L : 0369-5662
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Volume 38, Issue 6
Displaying 1-6 of 6 articles from this issue
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  • The Theory of Photographic Sensitivity of Silver Halide Emulsion
    Hiroshi HADA
    1975 Volume 38 Issue 6 Pages 503-514
    Published: November 30, 1975
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.38.503
    JOURNAL FREE ACCESS
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    The recent progress on the photographic sensitivity of silver halide emulsion was reviewed from the viewpoints of (i) electronic and ionic proproperties of emulsion grain, (ii) chemical sensitization, (iii) surface state of emulsion grain, and (iv) process of latent image formation. The mechanism of dye sensitization is also discussed.
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  • Estimation of Number and Spectral Characteristics of Component Dyes by Principal Component Analysis
    (III) Multi-component System
    Koji TAKAHASHI, Noboru OHTA
    1975 Volume 38 Issue 6 Pages 515-518
    Published: November 30, 1975
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.38.515
    JOURNAL FREE ACCESS
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    Principal component analysis is successfully used to separate overlapped spectral bands. In the previous papers, this technique was applied to two- and three-component systems. In this paper, the technique was expanded to the systems of any number of components. An example of calculation is shown for practical dyes used in color photography.
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  • The Application of Metallochromic Compound for EBR Medium (I)
    The Bleaching Reaction of Pyridylazonaphtol Chelate in Polymer Mattices by an Electron Bombardment
    Shin OHNO
    1975 Volume 38 Issue 6 Pages 519-524
    Published: November 30, 1975
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.38.519
    JOURNAL FREE ACCESS
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    When a non-photosensitive metallochromic pyridylazonaphtol chelate in polymer matrix was bombarded by an electron beam of medium energy (15 kV), its magenta color was turned to pale yellow. The decoloring reaction followed an first order reaction kinetics and was thought to be mainly due to an alteration of ligand. And it was effective in a matrix which liberated active acidic product by the bombardment.
    In the case of cuprous chelate (metal-to-ligand ratio was 1 : 1), the color of bombarded area was not so stable and the magenta recovered thermally. On the other hand in nickelous and zinc chelates (metal-to-ligand ratio was 1: 1), the decolored one was stable.
    The decoloration of the latter is thought to be useful in application as a positive type electron beam recording (EBR) medium. The recorded signal is expressed by an instant bleaching and medium is not sensitiv to light so that a fixing is not required for non-recorded area.
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  • Luminescence Properties of Cyanine Dyes. III. Subnanosecond Fluorescence Spectrometry by N2 Pulse Laser
    Takuji MIWA, Haruo OGAWA, Hidesaburo GENDA
    1975 Volume 38 Issue 6 Pages 525-531
    Published: November 30, 1975
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.38.525
    JOURNAL FREE ACCESS
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    Time resolved fluorescence spectra and their lifetimes of 3, 3'-diethylthiacyanine and chloride 3, 3'-diethyl-9-methylthiacarbocyanine iodide were obtained from analyses of their decay curves observed with N2 pulse laser. It was confirmed that fluorescence of dimers decayed faster than monomers, excited singlet states of cis monomers decayed faster than its trans monomers, and their lifetimes were several nanoseconds. The decay analyses were somewhat erroneus because of very short lifetimes, Then we tried various methods to overcome the difficulty and obtain accurate decay curves.
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  • Physical Restraining Property of Photographic Gelatins (I)
    pH Dependence of Physical Retardance
    Haruo IRIE, Takashi OHNO, Takuzo ISHIDA, Toji MAEHARA
    1975 Volume 38 Issue 6 Pages 532-539
    Published: November 30, 1975
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.38.532
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    The pH dependence of physical retardance of the 16 IAG gelatins was measured with the modified PAGI method. These gelatins were classified into four groups ac-cording to their pH dependence of physical retardance; 1) highly restraining over a wide pH range from 3 to 10, 2) highly restraining in acidic pH range from 3 to 6, 3) highly restraining in a narrow alkaline pH range from 9 to 10, 4) a little restraining only in acidic pH. The pH dependence of physical retardance of gelatins seems to depend not only on gelatin itself but also on the contents or ratio of impure substances in gelatins. The effects of nucleic acids and thiosulfate on the pH dependence of physical retardance of gelatins were tested.
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  • Chemistry of Color Photographic Image Formation
    Toshio MIYAGAWA
    1975 Volume 38 Issue 6 Pages 540-547
    Published: November 30, 1975
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.38.540
    JOURNAL FREE ACCESS
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    In this paper, basic informations on chemical processes in color photographic image formation by chromogenic development, silver dye bleach and DTR systems are given.
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