日本写真学会誌
Online ISSN : 1884-5932
Print ISSN : 0369-5662
ISSN-L : 0369-5662
39 巻, 4 号
選択された号の論文の6件中1~6を表示しています
  • 久保 走一, 末光 尚志
    1976 年 39 巻 4 号 p. 194-200
    発行日: 1976/07/25
    公開日: 2011/08/11
    ジャーナル フリー
    In this paper, an experimental method to evaluate the suitability of fluorescent lamp as a light source for color photography is described.
    In generally, fluorescent lamps are designed as a white light source based upon the metameric matching, but because of the defferences in spectral sensitivity of color photographic materials as compared with color matching function of human vision the failure of metameric matching exist in color photography.
    The authors examined the application and the modification of the method of specifying color rendering properties of light source to evaluate the suitability of fluorescent lamp in color photographic field. The obvious correlations between the parameters which introduced by the authors and the psychological evaluation, on reproduced colors that photographed by Ektachrome X, Kodachrome 25 and Kodachrome 64 with fluorescent lamp lighting, had obtained.
  • 一浴現像定着処理の速度論的アプローチ
    三位 信夫
    1976 年 39 巻 4 号 p. 201-207
    発行日: 1976/07/25
    公開日: 2011/08/11
    ジャーナル フリー
    A kinetic equation representing combined developing and fixing solution has been devised and experimentally substantiated.
    It is known that the rate of development under some conditions approximately follows a simple first-order equation. The rate of fixation does not generally follow a simple equation as it is governed by physical process, such as diffusion. However, it was found that the rate of fixation in some monobaths conforms apparently to a simple first-order equation owing to the diffusion effect of non-charged developing agents. In such monobaths, the rates of development and fixation were found to be also conform at higher exposure level to a first-order equation as follows, but not at lower exposure level. Development; dx/d (t-t0) =K (M-x)
    Fixation; dy/d (t-t0) =K (A-M-y)
    where t=time at a given stage of processing
    t0=initiation period of development
    x=developed silver at some time, t
    y=fixed silver at some time, t
    K=rate constant of monobath processing
    M=silver obtained in time at which silver growth ceases
    A=silver in film
  • 谷 忠昭
    1976 年 39 巻 4 号 p. 208-212
    発行日: 1976/07/25
    公開日: 2011/08/11
    ジャーナル フリー
    Some sensitizing dyes adsorbed by octahedral AgBr emulsion grains (-0.7μ) exhibited structureless light-induced ESR signals at g=2, 005. The highest occupied electronic energy level of the dye which could show the ESR signal is estimated to be higher by more than 0.3 eV than the top of valence band of AgBr. The signal intersity was decreased by halogen acceptors, by incorporating iodide into AgBr, by evacuation, and by sulfur sensitization. These results suggest that the observed ESR signal resulted from dye positive holes.
  • 大山 泰
    1976 年 39 巻 4 号 p. 213-224
    発行日: 1976/07/25
    公開日: 2011/08/11
    ジャーナル フリー
    Strange to say, no suitable dry-powder formula for acid hardening fixing bath has ever been published in literatures except the case of Woosley and Pankhurst of Ilford Ltd., in which sodium bisulfate (or sodium hydrogen sulfate) was used as sole solid acid instead of liquid (acetic) acid in ordinary solution formulae. It seems usual to use bisulfite or metabisulfite as solid acid in conjunction with sodium acetate in making up dry-powder formulae, because acetic acid is usually used with sodium sulfite in ordinary solution formulae. And it is found that useful dry-powder formulae can always be prepared from almost all existing solution formulae using some combinations of the following chemical equations;
    Na2SO3+CH3COOH=NaHSO3+CH3COONa (1)
    2Na2SO3+2CH3COOH=Na2S2O5+2CH3COONa+H2O (2)
    Na2SO4+CH3COOH=NaHSO4+CH3COONa (3)
    NaBO22H2O+CH3COOH=H3BO3+CH3COONa+H2O (4)
    For examples author's dry-powder formula of PF-6 is prepared from famous Kodak's solution formula of F-6 by combination of equations (2) and (4), and this is the best formula he recommends, because it is very stable and can be made up in single dry-powder package by only mixing the ingradients in powder form. Also author's PF-5 is derived from F-5 formula by the combination of equations (2) and (3). Other examples are also shown in Chapter 6 which includes the inverted case of obtaining a solution formula from existing dry-powder formula such as Formula D of Woosley and Pankhurst. Author's formula of PFA-6 is derived from PF-6 by only replacing sodium thiosulfate (150 g/l) in the formula with the (50: 50) mixture of ammonium and sodium thiosulfate (200 g/l). This is satisfactory rapid-acting and has a sufficient hardening property. Both PF-6 and PFA-6 can be satisfactorily used as a Stop-Fix bath for color-papers. All reference formulae are shown in the last table.
  • 浜野 裕司, 田部 洋
    1976 年 39 巻 4 号 p. 225-231
    発行日: 1976/07/25
    公開日: 2011/08/11
    ジャーナル フリー
  • 1976 年 39 巻 4 号 p. 255
    発行日: 1976年
    公開日: 2011/08/11
    ジャーナル フリー
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