COLOR FORMER MICROCAPSULE

PROBLEM TO BE SOLVED: To make useful mainly for a pressure sensitive duplicating paper, give enough color forming properties and heighten an environmental adaptability by a method wherein color former microcapsules are formed by involving a hydrophobic liquid consisting of terpene hydrocarbon, in which electron donable colorless dye is dissolved. SOLUTION: By involving a hydrophobic liquid consisting of terpene hydrocarbon, in which electron donable colorless dye is dissolved, color former microcapules are formed. The terpene hydrocarbon is a hydrocarbon having the molecular formula of (C5H8)n in the essential oil component of a plant and the source of smell transpiring from the branches, leaves, roots, stalks or the like of the plant. The liquid terpene hydrocarbon is exemplified by monoterpene, sesquiterpene, diterpene or the like. As the concrete example of the electron donable colorless dye, 3,3-bis(p-dimethylaminophenyl)-6-dimethylphthalide or the like is exampled. As the concrete example of the filmy material of capsule, gelatin, polyurethane or the like is exampled.