日本写真学会誌
Online ISSN : 1884-5932
Print ISSN : 0369-5662
ISSN-L : 0369-5662
37 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
  • 富士写真フイルム株式会社足柄研究所
    1974 年 37 巻 5 号 p. 237-250
    発行日: 1974/09/30
    公開日: 2011/08/11
    ジャーナル フリー
    A review on the progress of photographic science and technology in foregin countries in 1973. Subjects are selected from publications in 1973 covering the following fields: general view, cameras, lenses and accessories, light sources, B & W silver sensitive materials, nonsilver sensitive materials, color photography, mechanism of photographic sensitivity, processing, sensitometry and image evaluation, motion picture, scientific photography and graphic arts.
  • 定着速度を遅らす現像主薬の作用機構
    三位 信夫, 笹井 明
    1974 年 37 巻 5 号 p. 251-257
    発行日: 1974/09/30
    公開日: 2011/08/11
    ジャーナル フリー
    It had been found that developing agents do not affect the rate of fixation in monobaths of higher pH (above 11) but most of them slow down it in those of relatively lower pH, as shown in our previous reports. The mechanisum of the retardatory effect of developing agents on the rate of fixation at relatively lower pH were investigated in this paper.
    The results from some experiments relating to the retardatory effect of developing agents on the fixation process showed that it is caused by decrease in the rate of diffusion of the fixing agent and the complex silver-bearing ion through the emulsion layer due to adsorption of undissociated developing agents having hydroxyl groups on gelatin.
  • 藤波 重次, 三宅 洋一
    1974 年 37 巻 5 号 p. 258-266
    発行日: 1974/09/30
    公開日: 2011/08/11
    ジャーナル フリー
    The micro-spectrophotometer gives the curve of the spectral density distribution, of the light as in Fig. 1, transmitted through the small image on the color film and the curve shows the apparent peak densities (Dc, Dm, Dy in Fig. 1) which answer to the combination of the three component dyes (c, m, y). Starting from the values of three apparent peak densities, the numerical values based on the amount of exposure of red, green and blue band (Er, Eg, Eb) contained in the light affect to the photographic image are decided, through an analytical calculation to elliminate the effect of false densities (Cm, Cy, Mc, My, Ym, Yc in Fig. 1).
    Then, we tried to establish the Color Index system, Crg and Cgb, defined by the expressions shown below, to express numerically the spectral character of light from the object photographed.
    Crg=LogEr-Log Eg, Cgb=LogEg-Log Eb.
    The examples of the color index of some objects decided through the Ektachrome-X film are shown in Table 2 and 3.
    The real reversal color film has not sufficient faithfullness to perform the strict photometry based on the three color bands, because it has yet pretty large sources of error, such as the inter image effect (interlayers development effect) and as the inperfectness of color separation of the sensitive layers. The color index decided through color film is not the strict photometric value, and it is merely the value depend upon the arbitrary standard procedure. However, at least, it is clear that the color index is the value concerning to the spectral intensity distribution of the beam from the object.
    We believe that the color index system, even through usual color film, will be significant in the photographic observation to investigate the color character of objects in the field and also in the case of automatic processing by computer to extract the image with designated color index on the color picture.
  • The Application of Reactive Couplers for Color Photograhpic Materials
    Makoto YOSHIDA
    1974 年 37 巻 5 号 p. 267-271
    発行日: 1974/09/30
    公開日: 2011/08/11
    ジャーナル フリー
    The dyes are synthesized by the reaction of color developers with products obtained from dichlorotriazinyl reactive couplers with polymers. It is observed that the presence of combined polymers has no effect on the absorption of dyes. The color photographic materials are prepared from the gelatin products or the water-soluble diffusion-fast couplers. The materials are exposed and colordeveloped, then the photographic qualities and the light fastness of color images are compared. The possibility of application of reactive couplers to color photographic materials is confirmed.
  • 谷 忠昭
    1974 年 37 巻 5 号 p. 272-278
    発行日: 1974/09/30
    公開日: 2011/08/11
    ジャーナル フリー
    When the developer (pH 12.7) containing only hydroquinone as a developing agent was used, postively charged dyes (phenosafranine and 9-methyl-thiacarbocyanine) increased both amounts and optical densities of developed silver in cubic AgBr emulsions which had been fogged by reducing agents, causing little change in covering power (optical density/amount of developed silver) of the cubic AgBr emulsions. The increase of optical density of developed silver in the cubic AgBr emulsions caused by the dyes became smaller as the time of development increased. It has been suggested that positively charged dyes increased the rate of the development of the fogged emulsions by eliminating the negative charge barrier on the grains. No increase in amounts and optical densities of developed silver was caused by the dyes in octahedral AgBr emulsions fogged by redcucing agents. It has been suggested that fog centers were electrically neutral on the cubic grains and positively charged on the octahedral ones.
  • 1974 年 37 巻 5 号 p. 279-285
    発行日: 1974/09/30
    公開日: 2011/08/11
    ジャーナル フリー
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