. "The ink composition of claim 34, wherein the arylketoalkene light-stabilizing moiety is represented by the formula wherein at least one of R1 and R2 is an aryl group; wherein when R1 is an aryl group, R2 is a hydrogen, alkyl, aryl, heterocyclic or phenyl group, the phenyl group optionally being substituted with an alkyl, halo, amino or thiol group; wherein when R2 is an aryl group, R1 is a hydroge" . . . .