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 69, Issue 4
Displaying 1-3 of 3 articles from this issue
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  • Promotion of Collotype Printing: History and Future
    Tomoo KAWACHI
    2006 Volume 69 Issue 4 Pages 266-270
    Published: August 25, 2006
    Released on J-STAGE: February 17, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.69.266
    JOURNAL FREE ACCESS
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    On the occasion of Benrido's receiving the Toyo Award in 2006, this paper illustrates Benrido's activities in regard to promote the technical heritage of the Collotype printing. In addition, also described are the history and the current issues of The Association for the Preservation of Collotype and Printing Culture which was established by Benrido. The association's future plans are also discussed.
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  • Magnetic Field Effect on the Photocatalytic Reaction with TiO2 Semiconductor Film
    Masanobu WAKASA, Yusuke KOBAYASHI, Mitsutoshi OKANO
    2006 Volume 69 Issue 4 Pages 271-275
    Published: August 25, 2006
    Released on J-STAGE: February 17, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.69.271
    JOURNAL FREE ACCESS
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    Magnetic field effects (MFEs) on the photocatalytic decomposition reaction of methylene blue (MB) with a TiO2 semiconductor film were studied under magnetic fields of 0-1.5 T. Upon light irradiation on the TiO2 film in an aqueous solution of MB, the photocatalytic decomposition reaction occurred to form Azure A and Azure B, which were generated by N-demethylations of MB. Conversions of MB were observed in the absence and presence of a magnetic field of 1.5T by uvvis spectra. We found an increase of MB conversion by about 7% at 1.5 T. The MFEs can be explained by the Δg mechanism for electron-hole pairs, where the lifetime of the pair should be increased by the field.
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  • Preparation of Image Hologram with Thin Grating Composed of Gold Metal Layer
    Ken'ichi KUGE, Masao OOKI, Takaaki KOBAYASHI, Tomoko SAKAI, Tomoaki NA ...
    2006 Volume 69 Issue 4 Pages 276-278
    Published: August 25, 2006
    Released on J-STAGE: February 17, 2011
    DOIhttps://doi.org/10.11454/photogrst1964.69.276
    JOURNAL FREE ACCESS
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    It got image holograms composed of a thin gold layer using the silver halide photographic materials. The image hologram reproduced from the master hologram with an Ar+ laser beam was recorded on the photographic glass plate and self-made plate that an ultra fine-grain photographic emulsion was coated on a china dish. The gold deposition development made those to the image hologram composed of gold particles, and the baking treatment made the image by the grating with thin gold layer. This hologram is a surface relief type, and has a gold luster with a reflected light. Because the image hologram of gold layer consists of the diffraction gratings with a thin gold layer on a glass or ceramic base, this image should be chemically stable.
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