| 摘要 |
PURPOSE:To improve the recording sensitiveness by containing a specific phenokydine compound in a heat sensitive recording layer. CONSTITUTION:At least one sort of compound which can be indicated by a formula is contained in a heat sensitive recording layer of a heat resistive recording body utilized a coloration reaction between a colorless or light color basic dye and a coloration drug colorable with a contact of a dye. In the formulae, R1 and R2 indicate the hydrogen atom or alkyl group of C1-C4, Y1 and Y2 indicate the hydrogen atom, the chlorine atom, acetyl group, propinyl group, methoxyl group, methylthio group, methoxycarbonyl group, cyano group, nitro group, or cyclohexinylsel group, and (n) indicates 2 or 4. However, Y1 and Y2 can not be the hydrogen atom at the same time. The using ratio of the basic dye and the coloration drug is 100wt.pts of the dye to 100-700wt.pts. of coloration drug, and preferably approximately 150-400wt.pts. are used. Thereby, an extremely favorable recording sensitiveness improvement effect can be obtained without a deterioration of a degree of a white coloration. |
