Journal of the Japan Society of Colour Material
Online ISSN : 1883-2199
Print ISSN : 0010-180X
ISSN-L : 0010-180X
Volume 83 , Issue 11
Showing 1-6 articles out of 6 articles from the selected issue
Original Research Paper
Original Technical Paper
  • Mizuho HONMA, Hiroyuki TERAGAKI, Hiroyuki TAKAKI, Yasuyuki KISEKI
    2010 Volume 83 Issue 11 Pages 458-463
    Published: November 20, 2010
    Released: February 20, 2011
    Mass balance calculation method, which is one of the evaluation methods to estimate the release rate of biocides into the sea from antifouling paints, is theoretical method but not the actual measuring one. This paper reports an actual measuring result in comparison with the theory of the mass balance calculation method. The procedure to achieve this purpose, consumed film thickness and consumed copper amount from test panels were measured to get the total amount of copper released, then divided by immersion periods to get the release rates of copper.
    The result of hydrolysis type antifouling paint showed constant copper release during the test periods. On the other hand, the result of ablative type antifouling paint showed larger copper release at the first two months then became smaller at the later periods. But when the lifetime of antifouling paints was considered, the results were close to the values of mass balance calculation method. From the results, both types of antifouling paint were considered to be applicable to mass balance calculation method.
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Serial Lecture
  • Motonori ANDO
    2010 Volume 83 Issue 11 Pages 475-483
    Published: November 20, 2010
    Released: February 20, 2011
    Because of their high fastness to light and heat and high colorability, the phthalocyanines are used in many fields of blue- and green-pigment application, such as printing inks, paints, and even LCD color filters. In recent years, phthalocyanines have been used as not only coloring materials but also functional materials, such as electronic materials, catalyst, and near-infrared absorber. In this paper, the history, chemical structure, chemical property, crystal structure, synthesis method, pigment manufacturing method, and optical property of phthalocyanine pigments are reviewed. A thin film of a phthalocyanine that has a bulky substituent show improved properties in blocking of stacking between aromatic skeletons and optical absorption and reflectance.
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Serial Lecture
  • Akihiro OGATA
    2010 Volume 83 Issue 11 Pages 484-490
    Published: November 20, 2010
    Released: February 20, 2011
    Pigment in paint and printing ink is dispersed uniformly in resin and solvent (vehicle). Commercialized dry powder pigment does not give good dispersion because of strong pigment particle aggregates when it is only stirred in vehicle. Required color strength, gloss and hiding power in paint and printing ink are satisfied by dispersing their aggregates.
    Aggregates and dispersion stability are the matter of surface chemistry, and pigment manufactures are trying to solve those problems. I commentate on dispersion of pigment, which is needed in all of application used pigment, focusing particle as pigment character in the view point of pigment manufacture.
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