| 摘要 |
PURPOSE:To reduce the lowering of whiteness with the elapse of time and to improve the fading due to a fluorescent pen by using a specific dye as a basic dye and using an antipyrine complex of zinc thiocyanate represented by formula (I). CONSTITUTION:2,2-bis{4-[6'-(N-cyclohexyl-N-methylamino)-3'- methylspiro[phthalide-3,9'-xanthene]-2'-ylamino]phenyl}propane is contained in a recording layer as a basic dye and an antipyrine complex of zinc thiocyanate represented by formula [l] is contained as a coupler. As a specific coupler, the antipyrine complex of zinc thiocyanate is used but other coupler can be together used within a range not preventing effect. |
