日本写真学会誌
Online ISSN : 1884-5932
Print ISSN : 0369-5662
ISSN-L : 0369-5662
28 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
  • 神前 熈
    1965 年 28 巻 4 号 p. 165-172
    発行日: 1965/01/31
    公開日: 2011/08/11
    ジャーナル フリー
    Experimental results on the fundamental optical absorption in silver halides are discussed. It is concluded that the optical absorption edge can be explained only by indirect allowed optical transition. Discussions are made on the energy band structure of silver halides.
  • 前沢 秀憲, 中島 伍雄
    1965 年 28 巻 4 号 p. 173-178
    発行日: 1965/01/31
    公開日: 2011/08/11
    ジャーナル フリー
    In the previous report we described the fundamental characteristics of selenium photocell which is used for the zero adjust system in the camera with exposure meter. And it was concluded that for the purpose of this, it is desirable for internal series resistance γs to be low and for parallel resistance γp to be high.
    In this report we have discussed the manufacturing process which decide the value of γs and γp of selenium photocell. The contact surface between the selenium and the base metal, the quality of selenium, the shape of electrode, the sputtering condition of cadmium, etc. wnich influence the resistances of cell were discussed. In general we can settle the values of γs and γp independently: but in some cases there is a certain reciprocity, in which case it is necessary to select the most appropriate condition.
  • 狩野 雅一, 角 昭一郎
    1965 年 28 巻 4 号 p. 179-187
    発行日: 1965/01/31
    公開日: 2011/08/11
    ジャーナル フリー
    The print-out effects of siver bromide emulsions containing Cadmium chloride and Stannous chloride for the direct recording of Oscillograph traces were investigated.
    The primary exposures were given through a step-wedge with the Xenon flashtube Sensitometer at the times of 10-5, 10-4, 10-3 and 10-2, second. The latent image by the high intensity primary exposure was amplified by the action of secondary exposure light with ordinary white fluorescent lamp to form visible image.
    By addition of 30 mol % cadmium chloride and 20-30 mol % stannous chloride (based on silver bromide) to the silver bromide emulsion under the presence of 40 mol % excessive bromide, the threshold speed of the emulsion was remarkably increased and the reciprocity-law failure at low intensity was extremely enhanced. These metallic salts were added to the original silver bromide emulsion after physical ripening without the process of chemical digestion.
    It is supposed that stannous chloride contributes to the acceleration of print-out effects by its strong reducing reaction and bromine accepting ability and that cadmium chloride mainly functions as fog inhibiting agent.
  • 螢光X線分析法による現像ピース銀量の連続自動定量
    国峯 登, 矢部 孝太郎
    1965 年 28 巻 4 号 p. 188-194
    発行日: 1965/01/31
    公開日: 2011/08/11
    ジャーナル フリー
    Silver contents in every steps of processed photo film were determined continuously by fluorescent X-ray analysis, using a newly deviced film auto-moving apparatus.
    Setting the apparatus in sample chamber of X-ray spectrometer (Rigaku electric work, K-5), we get Log E and Silver content relation curve of processed photo-film within 20 minutes.
    In X-ray intensity determination, fixed 2θ method was used but we can't find any differenciation compared with usual peak method.
    By using our method, silver analysis time was extremely shortened and precision of the method was about ±2 % or less in films containing 25-60 mg silver per 100cm2 area.
  • 大山 泰, 宮沢 貞行
    1965 年 28 巻 4 号 p. 195-210
    発行日: 1965/01/31
    公開日: 2011/08/11
    ジャーナル フリー
    Among many hydrophilic high-molecular substances used as a substitute for photographic gelatine, there are some which contain in their molecule free carbonic acid residure, e. g. copolymers of maleic, acrylic or crotonic acid with other vinyl compounds. They react with those substances which have amino and (or) hydroxy groups in their molecule, e.g. gelatine or poly vinyl-alcohol, and as the result they form a net-like structure by their mutual cross-linking, and lose their solubility in water, yet do not lose their swelling property in water or in developer and other processing solutions, in contrast with the behavior of low molecular organic hardening agents, e.g. formaldehyde or mucochloric acid, which highly affect the swelling property as well as the solubility of their host binding agents.
    We determined melting-points, degrees of swelling and solubilities in water as well as in developer, of the dried gelatine gel films which contain various amounts of those high-molecular hardening agents, i.e. a copolymer of vinyl methyl ether and maleic anhydride (PVM/MA), a copolymer of vinyl acetate and crotonic acid (PVAc/CrA), a copolymer of styrene and maleic anhydride (ST/MA), poly acrylic-acide (PA), or some technical products of poly acrylic ester or amide containing free carbonic acid residues, together with poly vinyl-alcohol (PVA), which is not a hardener in itself for gelatine, and found that best results were obtained in the cases of using PVM/MA or PA as a hardener in gelatine with an appropriate amount of PVA.
  • 津田 穣, 中根 久, 粕川 俊一
    1965 年 28 巻 4 号 p. 211-215
    発行日: 1965/01/31
    公開日: 2011/08/11
    ジャーナル フリー
    Studies were made in order to prepare presensitized plates from poly (vinyl cinnamate), a photosensitive polymer, and zinc plates. Main results obtained are as follows:(1) A dark reaction of poly (vinyl cinnamate) in contact with a surface of zinc plates was not observed though the dark reaction in the same conditions had been reported by other authors, (2) Desensitization during storage was observed in the presensitized plate sensitized by some sensitizers. The phenomenon may be due to the evaporation of the sensitizers from a thin film of poly (vinyl cinnamate); therefore, sensitizers used for presensitized plates must be selected.(3) Coloration of poly (vinyl cinnamate) by phthalocyanine blue B pigment little affects the property of the photosensitive polymer.(4) After-exposure by a low-pressure mercury lamp (2537Å) must be made after development when the presensitized plate for relief printing is etched by Dow etch process for longer time than 5 minuites.(5) Poly (vinyl cinnamate) can be used as a resist for lithographic printing.
    It was concluded that presensitized plates for relief printing and lithographic printing can be made of poly (vinyl cinnamate) and zinc plates.
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