日本写真学会誌
Online ISSN : 1884-5932
Print ISSN : 0369-5662
ISSN-L : 0369-5662
32 巻, 5 号
選択された号の論文の6件中1~6を表示しています
  • 大山 泰
    1970 年 32 巻 5 号 p. 243-254
    発行日: 1970/03/15
    公開日: 2011/08/11
    ジャーナル フリー
    Various features of recent progress in diffusion-transfer-color materials similar to “ Polacolor” process are outlined according to the disclosures in patent literature. Author's some comments are also included.
  • 岩野 治彦
    1970 年 32 巻 5 号 p. 255-262
    発行日: 1970/03/15
    公開日: 2011/08/11
    ジャーナル フリー
    The rate of penetration of water and photographic chemicals into coated gelatin layers was determined by the indicator layer method.
    CoCl2 was a fairly satisfactory indicator for determing the rate of water penetration. The rate was inversely proportional to the square of layer thickness. The increase in pH or salt concentration of applied solutions retarded the rate, but the presence of AgBr grains in the layer did not affect it. The penetration rates from practical photographic solutions were also determined.
    The rates of diffusion of various kinds of developing materials wer determined by using AgBr as the detector. P-phenylenediamines had the largest diffusion constants among materials tested. They had no pH-dependence nor concentration-dependence. P-aminophenols had slightly lower diffusion constants than the corresponding p-phenylenediamines. The constants increased with increase in molecular sizes and also with pH. Hydroquinones had relatively small diffusion constants. They were considerably affected by variation of pH, concentration and ionic strength.
    The rate of penetration of OH- ion was determined by using brilliant yellow as the indicator. The rate depended on pH, ionic strength and buffering capacity of the solutions applied. By varying all these factors, the apparent diffusion constants of OH- ion changed from 10-9 to more than 10-7 cm2/sec. The effect of pre-swelling depended on compositions of both pre-swelling solution and alkaline solution.
    Other factors, including the application of viscous solutions, were also studied.
    The results were discussed from the point of rapid development.
  • 須賀 恒夫, 柴田 徹, 中村 和光
    1970 年 32 巻 5 号 p. 263-270
    発行日: 1970/03/15
    公開日: 2011/08/11
    ジャーナル フリー
    The effect of chemical sensitization on the silver chlorobromide emulsion has been studied. The emulsion containing the 30 mole percent of silver bromide was prepared with inert gelatin. The sensitizers used were thiosulfate for sulfur sensitization, chlorauric acid (Au+++) and aurothiocyanate (Au+) for gold sensitization.
    The experiments showed;
    1. Little increase in sensitivity was obtained by gold sensitization, considerable increase by sulfur sensitization, large increase by sulfur-gold sensitization.
    Sulfur sensitization gave the maximum sensitivity in the 2nd ripening process. No difference between Au+++ and Au+ was observed.
    2. The rate of development of a sulfur sensitized or of a sulfur-gold sensitized emulsion was greatly increased by hydroquinone and glycin, a little by metol, none by N-diethyl-p-phenylenediamine. The presence of silver sulfide and silver-gold-sulfide seemed to make the grain surface positive after exposure.
    3. p-Benzoquinone and bichromate were used as oxidizing agents for latent images and sensitivity centers. The latent image obtained by gold or gold-sulfur sensitization was more resistant to oxidation than that obtained by sulfur or non-sensitization. The sensitivity centers were more stable than the corresponding latent images. The sensitivity centers on gold or non-sensitisation were more easily oxidized than that on sulfur sensitization.
    From these results we discuss that silver sulfide, gold sulfide and silver-gold-sulfide act as a positive hole trap, gold ion acts as a photoelectron trap.
  • 高野 正雄
    1970 年 32 巻 5 号 p. 271-276
    発行日: 1970/03/15
    公開日: 2011/08/11
    ジャーナル フリー
    Modulation transfer function (MTF) of photographic materials is known to be valuable for expressing their optical characteristics. We have attempted in this report to evaluate optical and chemical modulation transfer function (MTFo and MTFc) of photographic materials separately.
    The modulation transfer functions were obtained by sine-wave illuminator and microdensitometer. Assuming that average density of sine-wave image at MTFc =1 equals its value at MTFc≠1, then MTFc and MTFo can be separated by calculation. The MTFo of a photographic material has almost the same values even if developer formulas and exposure levels were changed and MTFc showed maximum value at average optical density D=0.8. The granularity of the photographic material is effected considerably by this method. Then, we tried to obtaine MTFo directly by Fraunhofer diffractometer.
  • 谷 忠昭
    1970 年 32 巻 5 号 p. 277-281
    発行日: 1970/03/15
    公開日: 2011/08/11
    ジャーナル フリー
    Discussions were made on the relation between the mechanism of supersensitization proposed by Rosenoff et al., and that proposed by Gilman on the basis of the data of the ionization energies of sensitizing dyes in the excited triplet state I (3Dye)* estimated in this work. It was found that the values of I (3Dye*) studied by Gilman were larger and those of the dye studied by Rosenoff et al., were smaller than the electron affinity of silver halide (3.5 eV). Therefore, the dyes studied by Gilman have been thought to take part in the recombination process between a dye positive hole in the dye aggregate and an electron freed into the silver halide conduction band, and those studied by Rosenoff et al., are not. Namely, the difference of the proposed mechanisms has been thought to arise from the difference of the dyes studied. Discussions on the desensitization by sensitizing dyes have been led to the conclution that the desensitization comes from the recombination process between a photoelectron and a hole trapped by the dye aggregate, and support the above-mentioned discussions on the mechanism of supersensitization.
  • 内田 泰夫
    1970 年 32 巻 5 号 p. 282-283
    発行日: 1970/03/15
    公開日: 2011/08/11
    ジャーナル フリー
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