. . . . "The ink cartridge of claim 13, further comprising an arylketoalkene stabilizer represented by the formula ##STR37## 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" .