PRESSURE-SENSITIVE COPY MATERIAL

PURPOSE:To increase color forming speed by dissolving an electron acceptive developer and an electron donating color former in a mixture of sec- butyldiphenylmethane, sec-butyldiphenylethane (1, 1) and sec-butyldiphenylethane (1, 2). CONSTITUTION:The solvent for the color former solution of the pressure- sensitive copy material of this invention is composed of a mixture consisting of 20 - 80 wt.% of sec-butyldiphenylmethane, 5 - 50 wt.% of sec- butyldiphenylethane (1, 1) and 5 - 50 wt.% of sec-butyldiphenylethane (1, 2). An electron donating substance used as a color former is a substance colorless or light-colored at room temp. and reacting with an electron acceptive substance to develop a color. The solution of the above-mentioned color former in the aforementioned solvent is emulsified with and dispersed in an aqueous solution of a mixture consisting of gelatin and gum arabic and the formed capsule emulsion of minute oil droplets is applied to paper and a developer is applied to the surface of the paper opposed to the coating surface or to the coating surface itself in a layered form to make it possible to prepare the pressure-sensitive copy material.