Heat-sensitive recording material

摘要

Heat-sensitive recording material consisting of a support, a bottom layer formed on the support and consisting essentially of plastic particles with a spherical cavity which have a mean particle diameter of 2 to 20  mu m and a cavity ratio of 80 % or more, and a heat-sensitive colouring layer formed on the bottom layer and containing a dye leuco derivative and a colour developer capable of producing the formation of a colour in the dye leuco derivative by the application of heat.