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Dual Color Direct Thermal Recording Using Diphenylether Diazonium Salt

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We have designed and synthesized various diphenylether diazonium salts to produce a new fixable red-color-forming diazonium salt. The 4′-n-butyl-4-diazodiphenylether hexafluorophosphate (DED-PF6) obtained forms a vivid red color azo-dye, can be decomposed by 310-nm UV light, and shows good thermal stability. Combined with another commercially available diazonium salt, fixable black-red dual-color thermal recording (DCTR) was achieved. In red printing, the DCTR media allows additional recording and, when necessary, can be fixed by 310-nm UV light exposure. The DCTR is composed of only a single recording layer, which simplifies the manufacturing process compared to multi-layered recording media. DCTR also simplifies the printer mechanism, because it is not necessary to change the temperature of the thermal head between black printing and red printing; simply adding a fixing lamp to a conventional thermal printer is enough for DCTR.
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Document Type: Research Article

Publication date: September 1, 1998

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  • The Journal of Imaging Science and Technology (JIST) is dedicated to the advancement of imaging science knowledge, the practical applications of such knowledge, and how imaging science relates to other fields of study. The pages of this journal are open to reports of new theoretical or experimental results, and to comprehensive reviews. Only original manuscripts that have not been previously published, nor currently submitted for publication elsewhere, should be submitted.

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    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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