JPS5667292A - Multicoloring heat-sensitive recording material - Google Patents

Abstract

PURPOSE:To accelerate a coloring rate of the first heat-sensitive coloring layer and to enable a high-speed recording, by a method where in 4g/m<2> or less of a coating amount is applied to the second heat-sensitive coloring layer. CONSTITUTION:A leuco, which develops in reaction to a developer 12 at a higher energy than that of the second heat-sensitive coloring layer 2 and can color into a color tone similar to a black color, is arranged on a base substance. The second heat-sensitive coloring layer 2, which has a coloring agent 21 consisting of a leuco coloring into a blue, a red, green color, etc. resulting from the reaction to a developer 22, is laminated. Where necessary, an intermediate layer 3 having a complementary relation with first and second heat-sensitive coloring layers 1 and 2 is placed between said heat-sensitive coloring layers. In said multicoloring heat-sensitive recording material, an amount applied on the second heat-sensitive coloring layer is defined as 4g/m<2> or less, and this permits the improvement of a heat-sensitiveness and the formation of an excellent and clear multicolor recording picture even when a high-speed recording takes place.