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Molecular Design for Coloring/Decoloring Properties in Rewritable Paper Using Leuco Dyes: Effects of Long-chain Alkyl Group

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Printing systems with an information-display function are attracting increasing interest as greater volumes of information become available in digital format. We recently developed a practical rewritable printing system for displaying documents in which the coloring-decoloring reaction cycles are thermally controlled using leuco dyes. This system is composed of leuco dye molecules and acidic developer molecules with long-chain alkyl groups and associative groups; it exhibits colored/decolored states that can be reversed by varying the heat conditions. Since the reversibility property mainly depends on the molecular structure of the developer, we prepared simple developers with different alkyl lengths to investigate the structural effects. We found that controlling the physical properties of the long-chain alkyl group of the developer is the key to achieving both thermal stability of the colored state and rapid erasability.
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Document Type: Research Article

Publication date: 2005-01-01

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  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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