The invention discloses a reversible temperature-sensitive cigarette packing paper preparation method comprising the steps that: (1) a temperature-sensitive color-change core material is prepared by using a color-
change pigment with a reversible temperature-sensitive material; (2) the temperature-sensitive color-change core material is subjected to emulsification dispersion in a W / O dispersion
emulsion; (2) the emulsified temperature-sensitive color-change core material is mixed with a high-molecular
prepolymer shell material, and a microencapsulation reaction is carried out, such that temperature-sensitive color-change microcapsules are prepared; and (4) the obtained temperature-sensitive color-change microcapsules are diluted and are blended into
printing ink; printing is carried out upon cigarette packaging paper, and the packaging paper is air-dried. According to the invention, with a high-molecular
coating technology, the color-change core material is separated from the outside through the high-molecular shell material, such that paint color, shape, weight, volume,
solubility, reactivity, durability, pressure-sensitivity, heat-sensitivity,
photosensitivity, and the like can be freely adjusted, and dye safety is greatly enhanced.