PREPARATION OF PRESSURE-SENSITIVE COPY PAPER

PURPOSE:To shorten a curing time, to reduce curing shrinkage and to enhance the close adhesiveness to a support by compounding a cation polymerization type resin as an ultraviolet curable resin and together using a volatile org. solvent. CONSTITUTION:A support is printed with capsule ink containing a microcapsules encapsulating a chromogen substance, a volatile org. solvent and a cation polymerization type ultraviolet curable epoxy resin and the ink layer is irradiated with ultraviolet rays to be cured. When a melamine/formaldehyde resin capsule is used as the microcapsule, excellent capacity is obtained. An oxidation inhibitor and an ultraviolet absorber are added to the microcapsule if necessary and about 2 - 100pts.wt. of the microcapsule is usually compounded with 100pts. wt. of an ink medium. The compounding ratio of the volatile org. solvent and the cation polymerization type ultraviolet curable epoxy resin is usually within the range of about 95 : 5 - 10 : 90 (pts.wt.) and the coating amount of the capsule ink is pref. adjusted to the range of about 1 - 5g/m .