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 39, Issue 3
Displaying 1-5 of 5 articles from this issue
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  • The Approximation for Photographic Characteristic Curve by Using Mathematical Models (I)
    Black and White Negative Photographic Materials
    Masao INUI, Syuji KASHIWA
    1976 Volume 39 Issue 3 Pages 123-130
    Published: May 25, 1976
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.39.123
    JOURNAL FREE ACCESS
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    In the usual manner the relation between exposure and density, and some values of photographic materials derived from this relation are obtained graphically. The authors attempted to obtain these calculatively by using mathematical models.
    Three mathematical models were established for photographic characteristic curve. After the numerical analysis of parameters utilized in three models density values were calculated from values of parameters and were compared with density values obtained by experiment. Consequently it was found that a model gave satisfied approximation for most of photographic characteristic curves. Calculatively obtained values of sensitivity speed, γ and contrast index from parameters were neary equal to graphically obtained values.
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  • Treatment of Photographic Waste Water by Ozone (I)
    The Decomposition of Photo-processing Chemicals by Ozone
    Haruhiko IWANO, Yukio MATSUSHITA, Tsuyoshi ISHIKAWA, Jinichiro INOUE
    1976 Volume 39 Issue 3 Pages 131-138
    Published: May 25, 1976
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.39.131
    JOURNAL FREE ACCESS
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    In order to explore the possibility of applying ozone to the treatment of photographic waste water, the change in COD during the oxidative decomposition by ozone was investigated for some of the most widely-used photo-processing chemicals.
    Developing agents, sodium sulfite and thiosulf ate showed relatively high rate of decomposition, however, complete decomposition was achieved only in sulfite and in dilute thiosulf ate. Benzylalcohol, as well as acetic acid, were not decomposed, whereas cliethyleneglycol and formbisulfite showed the increase in COD with the progress of oxidation.
    The results indicate that, though ozone is a mighty oxidizing agent, it cannot afford the complete reduction of COD for most of photo-processing waste waters, unless some other technologies are combined with it.
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  • The Treatment of Photographic Waste Water by Ozone (II)
    The Application to Photo-processing Waste in Color Laboratories
    Haruhiko IWANO, [in Japanese], Yukio MATSUSHITA, Tadao HATANO, Tsuyosh ...
    1976 Volume 39 Issue 3 Pages 139-145
    Published: May 25, 1976
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.39.139
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    The application of ozone to waste water treatment in color laboratories were investigated with small-scale pilot apparatus combined with a small biodegradation plant.
    The combination enhanced the degree of degradation, since ozone decomposed un-biodegradable oxygene demanding components remaining in the effluent from the biodegradation tank. However, it was also found that insufficient biological treatment caused the decrease in efficiency of decomposition by ozone. The limit of COD level attainable in overall process was 20 mg/1, although 10 mg/1 was also possible in a particular deliberate case. The ozone treatment in the combined process is similar to the tertial treatment in the municipal sewage treatment plant, however, ozone consumption in this process was much larger than those for the latter.
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  • Physical Restraining Substances in Photographic Gelatins
    On Nucleic Acids Bases
    Takashi OHNO, Haruo IRIE
    1976 Volume 39 Issue 3 Pages 146-152
    Published: May 25, 1976
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.39.146
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    Component bases of nucleic acid in photographic gelatins were analyzed by the column chromatography in order to find out restraining substances. The pH dependence of physical retardance of gelatins changed by the ion exchange treatment. It was found that adenine, guanine and other bases were eliminated from gelatins by the deionization. Physical retardance lost by the ion exchange could be partly restored in neutral and alkaline pH's by the addition of adenine and guanine.
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  • Quantum Chemistry and Solid State Physics in Photographic Sensitivity
    Hiroshi HADA
    1976 Volume 39 Issue 3 Pages 153-163
    Published: May 25, 1976
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.39.153
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    Fundamental survey on quantum chemistry and solid state physics in photographic sensitivity is given. Theoretical base of electronic states in molecule and crystal, defects of ionic crystal, ionic conductivity and photoconductivity are discussed.
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