Journal of The Society of Photographic Science and Technology of Japan
Online ISSN : 1884-5932
Print ISSN : 0369-5662
ISSN-L : 0369-5662
Volume 35, Issue 6
Displaying 1-7 of 7 articles from this issue
  • [in Japanese]
    1972 Volume 35 Issue 6 Pages 339-343
    Published: November 30, 1972
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
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  • Syntheses and Absorption Spectra of Cyanine Dyes Having Pyrazineor Quinoxaline Nucleus
    Yasushi HISHIKI, Osamu NONAKA, Tamotsu UEDA
    1972 Volume 35 Issue 6 Pages 344-350
    Published: November 30, 1972
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
    Eight unsymmetrical carbocyanine dyes, eight hexamethine-hemicyanine dyes, containing pyrazine (P) nucleus, and five unsymmetrical carbocyanine dyes, containing quinoxaline (Q) nucleus were snythesized. And their absorption max. were determined. As for the relationship between basicity of P nucleus or Q nucleus and the absorption max. of their dyes, following results were obtained.
    (1) As basicity of the amine in the hemicyanines increase, absorption max. of the dyes containing P nucleus shifts to the longer wavelength.
    (2) Concerning the relations above mentioned, (P) effects largier influence to their ab. max. than benloxazole or benzothiazole nucleus, the latter had been reported previously.
    (3) Basicity of P nucleus is nearly about pKa 7.7.
    (4) Basicity of Q nucleus corresponds to benzoxazole nucleus.
    (5) Absorption spectra of unsymmetrical carbocyanine dyes containing Q nucleus show a shoulder at long wavelength side.
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  • Keiichi TANAKA
    1972 Volume 35 Issue 6 Pages 351-356
    Published: November 30, 1972
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
    The interaction of gelatin with various metal ions was investigated by electrophoresis, viscosity measurement and pH titration.
    Effect of metal ion on the electrophoretic mobility of the gelatin-AgBr sol was measured at pH 6 with several added metal ions. The mobility was decreased with the increase of metal ion concentration ae a consequence of the metal ion binding to gelatin adorbed around AgBr particles. Assuming that the reciprocal of the concentration of the metal ion at which the mobility of the sol becomes zero represents the binding affinity, it was found that the sequence of the binding affinity was Cu+2>Zn+2> Co-2, Ni+2, Mn+2>Ca+2. The result was supported by the measurement of viscosity variation and pH titration curve of gelatin containing a metal ion.
    Electrophoresis of the gelatin-AgBr sol cotaining K2SO4 or any one of following complexes (K2PtC14 and Na2WO4) at pH 3.7 was also measured. It was found that WO4-2 was bound by gelatin while the others were not.
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  • Takao NAKAYAMA, Yasuo NAKAI, Hiroshi KOKADO, Eiichi INOUE
    1972 Volume 35 Issue 6 Pages 357-360
    Published: November 30, 1972
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
    The authors have found that physical and chemical properties of solid state organic dyes were changed by light irradiation or thermal treatment. The photochemical change was more sensitive for ultra-violet light comparing with visible light. The changes by irradiation occured for the properties of solubility, melting point, light absorption and adhesion to the substrate.
    By using these changes, fair dye patterns were formed by some simple fixing after imagewise illumination. From the hologram recording by Argon laser, the resolution of image was about 1000lines/mm.
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  • 1972 Volume 35 Issue 6 Pages 360
    Published: 1972
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
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  • Fixation of thiocyanate salts
    Masami KAWASAKI, Takaaki OHTSU
    1972 Volume 35 Issue 6 Pages 361-367
    Published: November 30, 1972
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
    Thiocyanate salts are useful as a rapid fixing agent on silver halide emulsion. These salts, however, show the soluble effect on developed silver particles and softening of gelatin emulsion layer, and also form the insoluble complex salts in the emulsion layer while washing.
    The studies to make good these defect were carried on the preparation of rapid fixing solution with thiocyanate salts.
    On this paper, the photographic properties of the salts as a fixing solution were investigated under the various conditions. Both the clearing time of the emulsions and the effects on the dissolution of developed silver particles were examined, varying the component of the salts in the solution, by measuring the optical density decrease.
    The results obtained are as follows:
    1) The clearing time of thiocyanate salts such as ammonium, sodium and potassium are shorter than that of thiosulfate, and the results depend on the order of Ca++, Mg++, Li+, Na+, K+, NH4+ among these salts.
    The optimum concentration of thiocyanate was found in the range of 15-20%.
    2) 0.2 mol/l or more concentraton of thiosulfate should be added in 15% ammonium thiocyanate solution to prevent the formation of insoluble salts in washing process.
    3) The effect of thiocyanate salts on the dissolution of developed silver particles is negligible in the range of normal fixing time.
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  • [in Japanese], [in Japanese]
    1972 Volume 35 Issue 6 Pages 368-376
    Published: November 30, 1972
    Released on J-STAGE: August 11, 2011
    JOURNAL FREE ACCESS
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