Journal of the Japan Society of Colour Material
Online ISSN : 1883-2199
Print ISSN : 0010-180X
ISSN-L : 0010-180X
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Volume 60, Issue 2
Displaying 1-5 of 5 articles from this issue
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  • Dye Elution from Aluminum Lakes of Synthetic Food Colors (VII)
    Lakes Produced by One Step Method
    Yasushi KUBO, Makoto SHIRAI, Tomohiko IIJIMA
    1987 Volume 60 Issue 2 Pages 83-93
    Published: February 20, 1987
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.60.83
    JOURNAL FREE ACCESS
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    Aluminum lakes were prepared by one step method which includes direct precipitation of the lake from a mixed solution of aluminum chloride and food dye (Tartrazine, Sunset Yellow FCF or Bril liant Blue FCF) through neutralization by a sodium hydroxide solution, without formation of the aluminum hydroxide substrate as in the usual (two step) method.
    The product by the one step method was excellent in brilliance and transparency as well as in the anti-eluting strength in NaCl solution, whereas the lake composition was almost the same as the product by the two step method.
    The lake process was extremely simplified and the yield was also improved by this new method.
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  • Effects of Curing Condition on Transparency of Urushi Films
    Hiroshi OYABU, Toru ASAMI
    1987 Volume 60 Issue 2 Pages 94-99
    Published: February 20, 1987
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.60.94
    JOURNAL FREE ACCESS
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    From the standpoint of practical urushi coating, the effects of curing condition on transparency of urushi films were studied. Sugurome-urushi was cured for 24 hours at various curing conditions (Temperature : 20°C·30°C, relative humidity : 60-98% RH) and left for 90 days at natural light from north window. The changes in IR spectrums and transparency of their films were mainly measured with time.
    Main results were as follows,
    1) Urushi film cured at high relative humidity had many urushiol-quinones and polymerized quinones in comparision with that cured at low relative humidity. Consequently the transparency of that was bad.
    2) The transparency of urushi films left at natural light from north window rose with time because urushiol-quinones were gradually consumed. But there were difference of transparency with difference of curing condition at 90 days when rise of transparency of urushi film got calm after curing.
    3) In relations between drying time by measurement with RCI drying time recorder and transparency, transparency rose with increase of drying time and it was approximately constant when it was over one drying time.
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  • Solution Properties of Surfactants
    Liquid/Liquid Dispersion Systems
    Masahiko ABE, Keizo OGINO
    1987 Volume 60 Issue 2 Pages 100-110
    Published: February 20, 1987
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.60.100
    JOURNAL FREE ACCESS
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  • New Function of Surface Active Agents
    Yoshinobu NAKAMURA
    1987 Volume 60 Issue 2 Pages 111-116
    Published: February 20, 1987
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.60.111
    JOURNAL FREE ACCESS
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  • Recent Progress and Development on Emulsifiers
    Hisao TSUTSUMI, Yuji SUZUKI
    1987 Volume 60 Issue 2 Pages 117-129
    Published: February 20, 1987
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.60.117
    JOURNAL FREE ACCESS
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