A medium includes: a heat-sensitive medium subjected to thermal printing; and an adhesive medium to be superimposed on the heat-sensitive medium in a thickness direction and bonded to the heat-sensitive medium. The heat-sensitive medium includes: a surface contacting the adhesive medium; a heat-sensitive medium base material having a transparency; and a first color producing layer having a transparency. The heat-sensitive medium base material has an uneven shape having roughness greater than that of the surface of the heat-sensitive medium. The first color producing layer is configured to produce a first color when heated to a temperature higher than or equal to a first temperature. The adhesive medium includes: an adhesive medium base material; and an adhesive layer provided on the adhesive medium base material. The adhesive layer makes contact with the surface of the heat-sensitive medium so that the adhesive medium is bonded to the heat-sensitive medium.

A medium includes: a heat-sensitive medium subjected to thermal printing; and an adhesive medium to be superimposed on the heat-sensitive medium in a thickness direction and bonded to the heat-sensitive medium. The heat-sensitive medium includes: a surface contacting the adhesive medium; a heat-sensitive medium base material having a transparency; and a first color producing layer having a transparency. The heat-sensitive medium base material has an uneven shape having roughness greater than that of the surface of the heat-sensitive medium. The first color producing layer is configured to produce a first color when heated to a temperature higher than or equal to a first temperature. The adhesive medium includes: an adhesive medium base material; and an adhesive layer provided on the adhesive medium base material. The adhesive layer makes contact with the surface of the heat-sensitive medium so that the adhesive medium is bonded to the heat-sensitive medium.