Лако-красочные материалы — производство

Thermal recording materials consist of a heat-sensitive layer made by dispersing a leuco triphenylmethane dye and a phenol in a binder where the
two reactive materials are kept apart by a water — or nonpolar solvent — soluble polymer surface film. The phenolic materials are generally solids at room temperature. At the thermographic copying temperature the phenolic materials become liquid or gas and this allows for the reaction of the leuco dyes to produce a colored image.114