COLOR DEVELOPER MICROCAPSULE

PROBLEM TO BE SOLVED: To make a general-type dye usable and inhibit environmental disruption by using a mixture of a terpene hydrocarbon and a vegetable oil as a hydrophobic liquid, in a color developer microcapsule encapsulating an electron- donative colorless dye dispersed in the hydrophobic liquid. SOLUTION: A pressure-sensitive copying paper has an upper paper obtained by applying a color developer microcapsule composition composed mainly of a microcapsule encapsulating a hydrophobic liquid containing a dissolved electron-donative and almost colorless organic compound to one of the faces of a base paper. In addition, the pressure-sensitive copying paper has an intermediate paper having a developer composition, composed mainly of an electron- receptive compound, which is applied to one of the faces of the base paper and the color developer microcapsule composition applied to the other face, and a lower paper obtained by applying the developer composition applied to one of the faces of the base paper. In this case, a mixture of a terpene hydrocarbon and a vegetable oil is used as the hydrophobic liquid and an R(+)- limonene and/or an S(-)-limonene are used as the terpene hydrocarbon.