Journal of The Society of Photographic Science and Technology of Japan
Online ISSN : 1884-5932
Print ISSN : 0369-5662
ISSN-L : 0369-5662
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Volume 33, Issue 4
Displaying 1-7 of 7 articles from this issue
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  • Present Status of Photographic Industry in Japan from the Viewpoint of Patent Application
    Eiichi ASHIKAWA
    1971 Volume 33 Issue 4 Pages 193-203
    Published: January 20, 1971
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.33.193
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    The present status of photographic industry in Japan is outlined by explaining the industrial production and patent applications. It can be said that the growing activities of photographic industry is reflected in increasing number of patent application in this field. For example, application of patents in 1961 lied under 1, 000, . while in 1968 it goes over 2400. We must admit existince of some time lapse between patent application and its realization in industry, but it must be noted that the development of an invention must be accomplished more rapidly because the lifetime of a product is becoming short in recent years. Examples were shown in connection with the production of polyethylene tere-phthalate film, color couplers, easy loading system of camera, exposure control system of automatic camera etc.
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  • Distribution of Latent Image in X- and γ-ray Radiography
    Hiroshi HARA
    1971 Volume 33 Issue 4 Pages 204-209
    Published: January 20, 1971
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.33.204
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    The dependence of the distribution of latent image on radiation energy was studied in X- and γ-ray radiography.
    Measurements were carried out for nine sorts of industrial X-ray films of three manufactures and four sorts of other type films. As radiation sources, a visible blue light source, super soft and 180 kVp X-ray generaters, Cs-137 and Co-60 γ-ray sources and a 15 MeVp industrial betatron were used. For the development of films, D-19 b (total developer), surface developer (glycine used) and internal developer (added sodium thiosulf ate to D-19 b developer) were used, and as the bleaching solution, potassium ferricyanide solution and potassium dichromate solution were used.
    From the experimental results, it was found that regardless of the type of films the largest amount of internal latent image was obtained when they were irradiated with radiations of 90-160 kVp, and that in energy regions higher and lower than this, internal latent image shows a tendency to decrease in amount.
    This shows that the amount of internal latent image increases with the density of ion pairs produced in emulsion grains. Thus an energy dependence is observed for the distribution of latent image in X- and r-ray radiography.
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  • Studies on a Photographic Material of Vacuum-Evaporated Silver Halide:
    (I) Latent-Image Fading
    Masakazu HASHIUE
    1971 Volume 33 Issue 4 Pages 210-215
    Published: January 20, 1971
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.33.210
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    Latent-image fading observed in the evaporated film of silver bromide is greater than that in the conventional photographic materials which contain gelatin as the binder. Polymer layers coated over the evaporated film inhibit the fading to a great extent. The fading is also inhibited considerably when the evaporated film is kept in vacuum after exposed to light. These results show that the air plays the predominant role in latent-image fading. The grains of silver halide of which the evaporated filmconsists are directly in contact with the air by nature, while those in the conventional photographic materials are not in contact with it, being suspended in the binder. Therefore, assuming that the latent image is destroyed by the oxygen and the moisture from the air, it could be interpreted that the latent image produced in the evaporated film of silver bromide fades faster than that in the conventional photographic materials.
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  • Adsorption and Desorption of 2, 2'-Quinocyanine by Silver Bromide Grains
    Tadaaki TANI
    1971 Volume 33 Issue 4 Pages 216-221
    Published: January 20, 1971
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.33.216
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    Adsorption and desorption of 2, 2'-quinocyanine iodide by silver bromide grains in its aqueous and methanolic solution have been studied. The saturated amount of the adsorbed dyes was 5-6 times larger in aqueus solution than that in methanolic solution. The adsorbed dyes from its aqueous solution showed strong J-band, whereas those from its methanolic solution did M-band_ Any trace of the adsorbed dyes were not desorbed by water from the surface of AgBr which had been dyed by either aqueous or methanolc dye solution. However, the adsorbed dyes were easily desorbed by methanol. Moreover, the etherm obtained after desorption was nearly equal to the adsorption isotherm from metanolic solution, and the residual adsorbed dyes showed M-band. The obtained results were thought to support the physical adsorption of the dyes by AgBr. It has been considered that the absence of desorption of the adsorbed dyes by water comes from the large heat of adsorption of the dye, and that the desorption and the change of adsorption state of the adsorbed dyes by methanol arises from the fact that J-aggregate of the dyes is unstable and the dye in the molecular state is stable in the atmosphere of methanol.
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  • Studies on Cyanine Dyes (XXXIII)
    Yasushi HISHIKI, Osamu NONAKA, Kazuteru OGO
    1971 Volume 33 Issue 4 Pages 222-231
    Published: January 20, 1971
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.33.222
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    Twenty hexamethine (streptovinyl or part of them were composed of isophoron) hemicyanine dyes (I and III), containing benzothiazole nucleus and various amines were synthesized. Two symmetrical heptametine (straight chain or isophoron) thiacyanine dyes (II and IV) and ten pentamethine intermediate dyes (V) containing various amines both ends of them were also synthesized.
    There were found the linear relationship between the absorption max. of hemicyanine dyes and basicity of the amine as a composition of them, when the amine's basicity values lay within the range of pKa: 3.92 up to 5.61. And above pKa: 8.36 up to 11.12, there were found abnormality in these hemicyanine dyes.
    There exist only a few deviation between the observed absorption max. of (I) dyes and the mean value of the max. of the pair of related symmetrical dyes (V) and (II).
    Silver iodo-bromide emulsions were sensitized with these dyes which were much effective sensitizer, and lack of sensitivity at green region of spectrum were observed in every cases.
    Sensitization spectra for silver iodo-bromide emulsion with seven dyes were illustrated together with a control.
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  • Erratum to : The Rate of Penetration of Photographic Chemicals into Gelatin Layers (2)
    1971 Volume 33 Issue 4 Pages 231
    Published: 1971
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.33.4_231
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  • [title in Japanese]
    [in Japanese]
    1971 Volume 33 Issue 4 Pages 232-237
    Published: January 20, 1971
    Released on J-STAGE: August 11, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.33.232
    JOURNAL FREE ACCESS
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