Reversible recording medium, reversible recording medium coating, and exterior member

An exterior member having at least one surface provided with a reversible recording medium,

• the reversible recording medium comprising:
• a support base;
• and
• a recording layer provided on the support base and reversibly changing between a recorded state and a deleted state,
• the recording layer including
• a photothermal conversion material including one or more of a compound having a phthalocyanine skeleton, a compound having a squarylium skeleton, a compound having a cyanine skeleton that includes, in a molecule, one or both of a counter ion of one of SbF6, PF6, BF4, ClO4, CF3SO3 and (CF3SO3)2N and a methine chain containing a five-membered ring or a six-membered ring, and an inorganic compound, and
• a mixture of three types of microcapsules including respective coloring compounds to be colored differently from one another and respective color developing/quenching agents corresponding to the respective coloring compounds, wherein the respective coloring compounds each comprise a coloring compound having an electron-donating property, and wherein the respective color developing/quenching agents each comprise a color developing/quenching agent having an electron-accepting property and including at least one compound represented by a following general formula (1):
• where X is one of —NHCO—, —CONH—, —NHCONH—, —CONHCO—, —NHNHCO—, —CONHNH—, —CONHNHCO—, —NHCOCONH—, —NHCONHCO—, —CONHCONH—, —NHNHCONH—, —NHCONHNH—, —CONHNHCONH—, —NHCONHNHCO— and —CONHNHCONH—, and R is a linear hydrocarbon group having 29 to 34 carbon atoms.