Patent ID: 8563468

Claim:
A color-developing composition containing a molecular compound, wherein the molecular compound comprises as component compounds: H 2 O: and a compound represented by formula (I): wherein: Y represents: a C1-C12 hydrocarbon group which is chained or branched and saturated or unsaturated, or a C1-C8 hydrocarbon group which is chained or branched, saturated or unsaturated and has an ether or thioether bond, or represents the following formula: where: each R′ may be the same or different and each represents a methylene group or ethylene group; and T represents a hydrogen atom or a C1-C4 hydrocarbon group: R 1 , R 2 , R 3 , and R 4 each independently represents a C1-C6 alkyl group or C2-C6 alkenyl group; n, p, q, and r each represents any integer of 0 to 4; and m represents any integer of 0 to 2.