日本写真学会誌
Online ISSN : 1884-5932
Print ISSN : 0369-5662
ISSN-L : 0369-5662
34 巻, 2 号
選択された号の論文の5件中1~5を表示しています
  • 松井 茂
    1971 年 34 巻 2 号 p. 65-74,115
    発行日: 1971/07/31
    公開日: 2011/08/11
    ジャーナル フリー
    Facsmile is explained from both sides of its demand and hardware, and its technology is discussed as well as with technical problems which should be improved in the near future.
    In this paper, the author describes that the recording materials should be improved and supplied at low cost which would result in the increase of the demand of facsimile.
  • 田中 俊夫
    1971 年 34 巻 2 号 p. 75-84
    発行日: 1971/07/31
    公開日: 2011/08/11
    ジャーナル フリー
    Results of the authors' experiments on the print-out effect of a silverc hloride emulsion are summarized, and a quantitative interpretation of this effect is given. The quantum yield of silver production became unity only when low-pAg emulsions were given small exposures at low intensities. The yield usually decreased with increasing intensity. Print-out silver separated preferentially on the surface of silver chloride grains when low-pAg emulsions were given small exposures. Internal printout silver appeared with large exposures or with high-pAg emulsions. From these data it was concluded that excess silver ions in gelatin in low-pAg emulsions play the role of a source of silver ions for the neutralization of photoelectrons as well as the role of traps for photoelectrons. The intensity-dependent quantum yield φ may be expressed by the following equation
    φ=cv/m0(1+lnm0/cv)-e-sd/1-e-εd,
    where c is the number of electron traps at the surface of silver chloride per unit volume of the emulsion, v is the number of silver ions arriving at an electron trap per unit time, m0 is a constant proportional to intensity, ε is the “absorption coefficient” of the emulsion layer, and d is the thickness of the emulsion layer. With this equation the value of cv was calculated to be of the order of 1015cm-3. sec-1. Trials for independent determinations of c and v respectively are also described. c was determined by measuring the size of print-out silver particles with the aid of their color. v was determined by measuring the electrical conductivity of silver ions in gelatin film. The values thus obtained are consistent with the value of cv calculated above.
  • 田中 俊夫, 柏木 朗, 梅原 正彬, 田村 幹雄
    1971 年 34 巻 2 号 p. 85-92
    発行日: 1971/07/31
    公開日: 2011/08/11
    ジャーナル フリー
    Migration of silver ions from bulk gelatin to the surface of silver halide grains takes place in the print-out process of silver-ion excess emulsions. The electrical conductivity of gelatin films containing silver ion was measured and the transport number of silver ion determined to know to what extent the silver ions are mobile in gelatin. The initial conductivity was of the order of 10-7-10-6 ohm-1 cm-1 depending on silver-ion content and applied voltage. The transport number of silver ion was 0.65 for a film containing 10-3 mol g-1 silver ion electrolysed for 5 min in the field of about 103 volt cm-1. Itdecreased with decreasing silver-ion content and with increasing time of electrolysis. The current which passed through films decreased rapidly during the first few minutes due to polarization and then slowly due to electrolysis.
  • 谷 忠昭
    1971 年 34 巻 2 号 p. 93-98
    発行日: 1971/07/31
    公開日: 2011/08/11
    ジャーナル フリー
    The absorption spectra of dyed grains have been measured before and after drying the grains, and compared with the adsorption isotherm when 2, 2'-quinocyanine has been adsorbed by silver halide grains. In the absorption spectra of the dyed grains after drying, the grains with small amounts of the adsorbed dyes have mainly shown M band, and the grains with large of the absorbed dyes have shown strong J band. On the other hand, in the absorption spectra of the dyed grains before drying, all grains which adsorbed the dye by the surface coverage of 10-100% have shown nearly the same spectra in shape with strong J band. Since the spectra of the grains before drying correspond to the adsorption isotherm, the informations derived from the isotherm, such as the heat of adsorption, the saturated amount of adsorbed dyes, etc. are thought to correspond to the adsorbed dyes in the Jaggregated form. The shapes of the spectra of the dyed grains before drying are also similar among silver chloride, silver bromide and silver iodide grains, regardless of the amounts of the adsorbed dyes. This result supports the adequacy of the comparison of the informations derived from the isotherm amoung different silver halides, as was done in the earlier papers. M band of the dyed grains after dring has been again converted to strong J band after the dried grains were bathed in water. Namely, the adsorption state of the dye reversibly changes, depending upon the existence of water. This result supports the physical adsorption of the dye by silves halides.
  • 中根 久
    1971 年 34 巻 2 号 p. 99-107
    発行日: 1971/07/31
    公開日: 2011/08/11
    ジャーナル フリー
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