A new rewritable system using fading process by corona discharge to water-soluble monascus ink

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  • コロナ放電により水溶性モナスカスインクを消去する新規のリライタブルシステム
  • コロナ ホウデン ニ ヨリ スイヨウセイ モナスカス インク オ ショウキョ スル シンキ ノ リライタブル システム

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Abstract

We developed new rewritable system which is composed of bacterial-cellulose (BC)/silica composite paper, microbial ink derived from the fermatation of Monascus fungi and fading process using corona discharge. From the experimental results, we note that: (I) the print on BC/silica composite paper exposed to the corona discharge has only a fading time of 10 s (the time is at least 1000 times faster than that of print for the photo-fading), (II) the paper coated with BC/silica layer is more effective in a fading treatment than non-coating paper, (III) the loss of chromophore in monascus dye is attributed to electrophilic reaction by oxidation gas, i.e., ozone, resulting in a low ionization potential of monascus dye, (IV) the rewritable performance is useful for several times. Taking all the factors into consideration, we propose that biotechnology-exploited ink and media together with low-energy discharge process constitute a new-environmental rewritable system, which can encourage reuse and recycling of paper.

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