Security Paper Sheets Using Kapok Fibers Containing Chromic Materials

  • KIYAMA Shuichi
    Course of Electrical and Electronic Engineering, Graduate School of Engineering, Tokai University, JAPAN
  • MAEDA Shuichi
    Course of Electrical and Electronic Engineering, Graduate School of Engineering, Tokai University, JAPAN

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Description

Kapok fiber is natural half-transparent hollow tube whose inner and outer diameters are 18 and 20 mm, respectively. This fiber excels in water repellence and absorbs oil due to the capillary force. In addition, the hollow rate of this fiber is higher than those of conventional synthetic fibers. The focus of this present work is to develop a novel paper sheet which integrating Kapok fibers containing chromic materials. The solvent which contains chromic materials was absorbed into Kapok fibers due to the capillary force. We found that the paper sheet exhibits reversible color change.<br>Keywords: Security paper, Chromic material, Kapok fiber

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