| 摘要 |
PURPOSE:To reduce color erasing and base coloring due to heat and moisture of color former and to extremely decrease in the return of color by incorporating normal achromatic or pale coloring substance and specific compound. CONSTITUTION:Normally achromatic or pale coloring substance, and compound represented by (R-O-CO-CH=CH-CO-O)2Zn, where R is alkyl group or R1-O-R2-, R1 is alkyl group or aryl group, and R2 is alkylene group, are contained. The compound represented by the above formula contains octyl ester zinc salt maleate, dodecyl ester zinc salt maleate, etc., and particularly compound containing benzene ring or compound containing ether bond preferably has large effect. Various dyes are known as the normally achromatic or pale coloring substance, and those generally employed as pressure sensitive recording sheet or thermal sensitive recording sheet are not particularly limited. The quantity of metallic salt compound represented by the formula is 0.1-10 parts to 1 part of the normally coloring dye. |
