Journal of the Japan Society of Colour Material
Online ISSN : 1883-2199
Print ISSN : 0010-180X
ISSN-L : 0010-180X
Volume 63 , Issue 5
Showing 1-6 articles out of 6 articles from the selected issue
  • Seisirô ITÔ, Hiroshi TOMINAGA, Masakuni YOSHIHARA
    1990 Volume 63 Issue 5 Pages 257-261
    Published: May 20, 1990
    Released: November 20, 2012
    JOURNALS FREE ACCESS
    The aim of this study was to synthesize fine iron particles by reducing an iron complex in an organic solvent. When tris (acetylacetonato) iron (III) in diphenyl ether was refluxed without any reducing agent, or was reduced by hydrazine, no metal iron was produced. However, metal iron particles could be produced when the iron complex was refluxed in N2 atmosphere for 12 hours with sodium borohydride, of which amount was 60 times greater than the complex in molar ratio. The purity of the product was about 91.2%, and the particle size was 10 to 20 nm. Received October 24, 1989
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  • JIANG YI, Takeshi AMARI, Koichiro WATANABE
    1990 Volume 63 Issue 5 Pages 262-268
    Published: May 20, 1990
    Released: November 20, 2012
    JOURNALS FREE ACCESS
    The penetration of a news ink into paper stocks having different oil resistances was examined. Ink penetration was monitored by the image analyzing system based on the reflection density of the reversed side of the printed paper. The penetration depth increased in proportion to the square root of time before it reached an equilibrium state. Ink penetration was depressed by the oil resistant agent which was adsorbed on the interior of paper with irregular pore structure. The dependence of penetration depth on time varied widely corresponding to the irregularity of pore structure of paper. The standard deviation of the penetration depth immediately after ink transfer was not affected by the oil resistant agent. However, with increasing time, the influence of oil resistant agent on the standard deviation became greater. The greatest standard deviation was found on the sample stock including 0.1% of the oil resistant agent. Ink penetration behavior can be predicted by the percolation theory.
    When the ink was pressed into the pores of the stock under the printing pressure, it was found that the quantity of the initial penetration did not depend on the quantity of the oil resistant agent in the paper stock.
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  • Yasuyuki KUGE
    1990 Volume 63 Issue 5 Pages 269-270
    Published: May 20, 1990
    Released: November 20, 2012
    JOURNALS FREE ACCESS
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  • Takashi TSUNOKUMA, Jun-ichi TATSUMI
    1990 Volume 63 Issue 5 Pages 271-280
    Published: May 20, 1990
    Released: November 20, 2012
    JOURNALS FREE ACCESS
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  • Hiroki KATSUYAMA, Singo OKAMOTO
    1990 Volume 63 Issue 5 Pages 281-289
    Published: May 20, 1990
    Released: November 20, 2012
    JOURNALS FREE ACCESS
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  • Susumu NOZAWA
    1990 Volume 63 Issue 5 Pages 290-298
    Published: May 20, 1990
    Released: November 20, 2012
    JOURNALS FREE ACCESS
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