High Thermosensitive Paper with the Color-Developer Containing Sulfur Atoms

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  • 含硫黄系顕色剤による感熱記録紙の高感度化
  • ガン イオウケイ ケンショクザイ ニ ヨル カンネツ キロクシ ノ コウ カン

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We have developed new phenolic compounds containing sulfur atoms used for the color-developers of the leuco-type thermosensitive papers.<BR> The most valuable color-developer is a di-phenol which combines two 4-mercaptophenols with an alkylene group containing ether radicals.<BR> The themosensitive paper using this color-developer has extremely high themosensitivity and high stability of the developed image.<BR> In this paper, we report (1) Theoretical relationship between the thermosensitivity of the themosensitive paper and the ionization potensial of the color-developers and (2) Consideration to the reason why the colordevelopers with sulfur atoms having high-themosensitivity.

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