Development of fine powdered silica for thermal recording paper

Thermal recording paper typically used in facsmile system has been rapidly expanding to great proportions and has secured a firm position in an information-oriented society. This would result the systematic development between electronic technology in hardware industries and coating technology in paper industries including various raw material industries.The fine powdered silica, “Mizukasil”, has played an important role in the development of the thermal recording paper as a residue-preventing agent on a thermal head. Since this fine powdered silica has extremely fine particles and is inactive, it combines the following advantages in residue-prevention, sticking prevention, color-developing sensisivity, color intensity, dot minuteness, color gradient and runnability of the thermal head.