Heat-sensitive recording material containing microcapsules containing coloring component(s) and organic solvent

Abstract

A heat-sensitive recording material, comprising a support having thereon a layer containing microcapsules containing at least a first component capable of causing a coloring reaction as a core material, and, outside of the microcapsules, at least a second component causing said coloring reaction with said first component in the microcapsules, wherein the microcapsules contain an organic solvent in the cores thereof, the average particle size of the microcapsules is 8 microns or less, and the value of (number average wall thickness .delta. (in microns)/volume average particle size D (in microns)) of the microcapsules is 1.times.10.sup.-2 or more. The coloring components that may be used in the core include leuco dyes and diazo compounds. The organic solvents have a boiling of 180.degree. C. or more. The heat-sensitive recording material has excellent pressure are friction resistance, a high heat coloring property and an excellent production aptitude.

Dependencies are inferred from the claim text.