日本写真学会誌
Online ISSN : 1884-5932
Print ISSN : 0369-5662
ISSN-L : 0369-5662
31 巻, 2 号
選択された号の論文の6件中1~6を表示しています
  • 誤っていた天保12年(1841)の渡来説
    金丸 重嶺
    1968 年 31 巻 2 号 p. 69-73
    発行日: 1968/08/25
    公開日: 2011/08/11
    ジャーナル フリー
  • 桑原 義美, 入江 宗一郎, 杉田 定男, 梁井 光二, 武田 成子, 貞木 浩
    1968 年 31 巻 2 号 p. 74-80
    発行日: 1968/08/25
    公開日: 2011/08/11
    ジャーナル フリー
    The behavior of thirty triazolo [4, 5-d] pyridazines [TPD], six imidazolo [4, 5-d] pyridazines [IPD] and three benzotriazoles as an addition agent for a photographic emulsion was studied. TPDs substituted by methyl, alkoxyl and acetamino radical at 4 and 7 position exhibited a good stabilizing effect, however TPD without a substituent did not (Table 1). IPDs showed only weak stabilizing action.
    The retardation of these compounds on chemical ripening (Fig. 1) and silver sulfide forming reaction between silver iodobromide and thiosulf ate ion at pH 6.0 (Fig. 2, Table 3) was connected with the stabilizing effect.
    In the last experiment, silver iodobromide particles were suspended in a polyvinylalkohol solution. To this suspension, sodium thiosulf ate solution was added and this suspension were ripened for 80 min. at 55°C. In this period, each stabilizers were added and the ripening was continued for further 120min. The suspension was chilled and a developer solution was added. After a stop and fixing solution were added, the optical density was measured. As is seen in Fig. 3 and Table 4, some of TPDs retarded the ripening almost completely by presence of only ten fold moles of the amount of thiosulfate ion. On the other hand, 5-methyl-7-oxy-s-triazolo [2, 3-a] pyrimidine required twenty five fold moles of thiosulf ate ion in order to exhibit the same effect. These results coinsided with the inhibiting effect for chemical ripening with thiosulf ate in an innert gelatine medium.
    In this series of the experiments, a type of compounds which exhibited an effective retardation of a chemical ripening but only weak retardation of incubation fog were found.
  • 高照度露光時の潜像分布および現像特性に対する効果
    酒井 秀丸, 馬場 重司
    1968 年 31 巻 2 号 p. 81-86
    発行日: 1968/08/25
    公開日: 2011/08/11
    ジャーナル フリー
    The effect of hexachloroirridate on the exposure intensity dependence of the distribution and the developing property of the latent image was examined. Hexachloroirridate added at the precipitation of silver halide eliminates the high intensity reciprocity law failure of the emulsion as described in the previous paper. Generally, the developing rate of the emulsion is decreased with the increase of light intensity of the exposure, this phenomena has be known as Cabannes-Hoffman effect. And the ratio of the surface sensitivity to internal sentitivity of the silvev halide grain is decreased with the increase of the exposure intensity. In the emulsion prepared in the presence of the small amount of hexachloroirridate Cabannes-Hoffman effect and the influence of the exposure intensity on the latent image distribution are eliminated completely.
  • 水沢 伸也
    1968 年 31 巻 2 号 p. 87-92
    発行日: 1968/08/25
    公開日: 2011/08/11
    ジャーナル フリー
    A large quantity of sulfite interferes the formation of white colloidal turbidity in mercuric bromide test for the determination of extremely small quantity of thiosulfate. Disappearance of turbidity does not be due to relative quantity of sulfite to thiosulfate, but is caused by the formation of complex compound of sulfite and mercuric bromide reagent. The formation of the stable compounds of sulfite and mercuric bromide reagent was ascertained by the measurements of spectral absorptions of mixed solutions of sodium sulfite and mercuric bromide reagent at various ratios. Absorbancy at 232 mμ indicates maximum at 1: 1 (molar ratio) of sodium sulfite to mercuric bromide, with continuous variation method. With molar ratio method, absorbancy curve at 232 mμ shows the two break points at molar ratios 1: 1 and 1: 2 of mercuric bromide to sodium sulfite, indicating the presence of 1: 1 and 1: 2 compounds.
  • 中津井 久, 菊池 真一
    1968 年 31 巻 2 号 p. 93-96
    発行日: 1968/08/25
    公開日: 2011/08/11
    ジャーナル フリー
    The present paper describes the results of an investigation of latent image formation and topography upon different types of exposure. The photographic emulsion used in this work have been prepared by a Sakura infra-red 750.
    The exposure have been made with light from a tungsten lamp and high pressure Hg-lamp.
    Latent image distribution was used as for the glycine-carbonate surface developer. And internal developer was prepared by adding sodium thiosulf ate to D-19 developer. As the bleacher for destruction of the surface latent image was used acid-dichromate solution.
    We obtained the distribution rate of latent image in the ultra-violet and infra-red regions, which was (DI/DS) I.R>(DI/DS) U. V in the intermediate intensity exposure and (DI/DS) I.R-(DI/DS) U, V in the low intensity exposure.
  • 田村 幹雄, 羽田 宏, 藤原 信一, 牛丸 晶
    1968 年 31 巻 2 号 p. 97-101
    発行日: 1968/08/25
    公開日: 2011/08/11
    ジャーナル フリー
    Photocurrent was measured with compacted or sintered AgBr powders. The forward-current increased at first and reached the maximum, then decreased to equilibrium value decided by recombination of electrons and holes. Thermally stimulated current and dark conductivity were measured. An activation energy of 0.26 eV was found with both compacted and sintered silver bromide powders. Besides 0.26 eV, activation energies of 0.35 eV and 0.78 eV were obtained in the case of sintered samples. Effects of adsorbed oxygen on the photocurrent were observed and discussed.
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