日本写真学会誌
Online ISSN : 1884-5932
Print ISSN : 0369-5662
ISSN-L : 0369-5662
43 巻, 1 号
選択された号の論文の7件中1~7を表示しています
  • 岩野 治彦
    1980 年 43 巻 1 号 p. 5-14
    発行日: 1980/02/20
    公開日: 2011/08/11
    ジャーナル フリー
    With the tendency of increasing usage of photographic materials for archival purposes, the image stability is considered to be one of the most important characteristics that they have to provide with. This article discusses the subjects on: 1) The factors affecting the life of photographic images. They are classified as environmental, material and processing factors. 2) The image life of typical color materials including Quadrichromie. 3) The problems encountered in improvements of photopraghic image stability. 4) Recomendations for methods of long term storage of photographic images.
    For extending image life, it is strongly recommended to choose suitable storage conditions, as well as proper processing and suitable materials.
  • 大庭 成一
    1980 年 43 巻 1 号 p. 15-21
    発行日: 1980/02/20
    公開日: 2011/08/11
    ジャーナル フリー
  • 露出の異なる2枚の画像から求めた写真特性曲線 (ii) ステップ・タブレットを通して露光された画像
    犬井 正男
    1980 年 43 巻 1 号 p. 22-26
    発行日: 1980/02/20
    公開日: 2011/08/11
    ジャーナル フリー
    A method of determining a photographic characteristic curve from two images formed with different exposure levels by using a mathematical model for the photographic characteristic curve was developed. A negative film was exposed with two different exposure levels through a step tablet in a sensitometer. Values of parameters employed in the mathematical model and relative exposures were computed from experimental densities of two negative images. Densities were calculated from values of parameters by using the mathematical model. Calculated densities were nearly equal to experimental ones. Consequently the proposed method was confirmed.
  • Tadaaki TANI
    1980 年 43 巻 1 号 p. 27-38
    発行日: 1980/02/20
    公開日: 2011/08/11
    ジャーナル フリー
    By varying the time interval (Δt) between the end of the exposure and the begining of the devevelopment, it was found that latent images were rapidly disappearing after exposure to light in the presence of some kind of dyes. The dyes which caused the above-shown disappearance of latent images were those the highest occupied levels of which were by more than 0.3 eV higher than the top of the valence band of silver bromide, showed the light-induced ESR signals which were considered to result from the formation of dye positive holes in emulsions, and caused strong desensitization through hole-trapping. The obtained results supports the view that the observed disappearance of latent images results from the reaction of dye positive holes with the latent images, and that this reaction is one of the causes for the desensitization by efficient spectral sensitizing dyes.
  • フルフラール・N-メチルアニリン・PVC系の電子線及びX線による発色特性
    小水 秀男, 本田 皓一, 山中 雄, 矢部 明, 川崎 正美, 藤井 悦男
    1980 年 43 巻 1 号 p. 39-47
    発行日: 1980/02/20
    公開日: 2011/08/11
    ジャーナル フリー
    Dye-precursors made from furfural and some aniline derivatives become red-colored upon irradiation with ionization radiations in PVC matrix, forming Stenhouse salts with the HCl evolved from the matrix. The coloration of the precursor from N-methylaniline, having the most excellent potential for dosimetry among the precursors, was studied for the irradiation of electron beam (60 kV) and X-ray (50-240 kVp).
    The following conclusions were obtained for the electron beam bombardment.(1) The response range is 10-8-10-6 C/cm2 or 103-105 rad, where good linearity between coloration and charge density exists.(2) The highest sensitivity is obtained when the concentration of the precnrsor is≥5 wt% for the amount of PVC and the film thickness is≥32μm.(3) Addition of 25 wt%of DOP enhances not only the sensitivity by ca. 20% but also the stability of the color from several days to several months.(4) The sensitivity is increased by ca. 15% when a conductive base is used for the film.(5) G value for the formation of the dye, i.e., that for the formation of HCl is 13.5-15.5.
    The followings were obtained for the irradiation of X-ray.(1) The response range is 103-105 R or rad.(2) The sensitivity for the absorbed dose is independent of the energy but is approximately proportional to the film thickness.(3) The sensitivity is higher than that for electrons by the factor of ca. 1.6, reflecting the higher G (HCl) value, 23-25.
  • Takashi OHNO, Masafumi KAMOI, Fumio KARASAWA, Shinya MIZUSAWA
    1980 年 43 巻 1 号 p. 48-50
    発行日: 1980/02/20
    公開日: 2011/08/11
    ジャーナル フリー
    An ion chromatographic technique was used to analyze (sodium) thiosulfate in photographic gelatin. A specially prepared anion exchange resin of very low capacity was used as a packing material of a concentrator column. and a separating column. Thiosulfate ion was first concentrated in a concentrator column by flowing the aqueous solution of photographic gelatin, and then thiosulfate was eluted by appropriate eluent and detected with a conductivity cell. This was found to be very simple method to analyze thiosulfate in gelatin.
  • 1980 年 43 巻 1 号 p. 69-76
    発行日: 1980/02/20
    公開日: 2011/08/11
    ジャーナル フリー
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