The performance of traditional thermal paper is based on the physical and chemical properties of its functional coatings. An insulating pre-coating is needed to control the effects of applied thermal energy. The insulation is typically achieved by using calcined clay in the pre-coating. Our FP-365 pigment comes with the needed physical properties and thus enables a partial replacement of calcined clay. Due to the high brightness of our pigment, the final paper benefits from a higher contrast between the printed and unprinted surface.