Ink for ink jet printers

A mutable ink composition suitable for ink jet printing comprising a mixture of:

• a colorant;
• a radiation transorber;
• and
• a liquid vehicle;
• wherein the radiation transorber is selected from the group consisting of 2-[p-(2-methyllactoyl)phenoxy]ethyl 1,3-dioxo-2-isoindolineacetate having the following structure ##STR42## and 2-hydroxy-2-methyl-4'-[2-[p-(3-oxobutyl)phenoxy]ethoxy]-propiophenone having the following structure ##STR43##

A method of printing comprising ejecting droplets of a mutable ink composition onto a substrate from an ink jet printer in an image-wise pattern, said mutable ink composition comprising a mixture of:

• a colorant;
• a radiation transorber;
• a molecular includant;
• and
• a liquid vehicle;
• wherein the radiation transorber comprises a photoreactor covalently bonded to a wavelength selective sensitizer represented by the formula ##STR44## wherein at least one of R.sub.1 and R.sub.2 is an aryl group;
• when R.sub.1 is an aryl group, R.sub.2 is a hydrogen, alkyl, aryl, heterocyclic or phenyl group, the phenyl group optionally being substituted with an alkyl, halo, amino or thiol group;
• when R.sub.2 is an aryl group, R.sub.1 is a hydrogen, alkyl, aryl, heterocyclic or phenyl group, the phenyl group optionally being substituted with an akyl, halo, amino or thiol group;
• and
• wherein the molecular includant is covalently bonded to the radiation transorber.

A method of printing comprising ejecting droplets of a mutable ink composition onto a substrate from an ink jet printer in an image-wise pattern, said mutable ink composition comprising a mixture of:

• a colorant;
• a radiation transorber;
• and
• a liquid vehicle;
• wherein the radiation transorber is selected from the group consisting of 2-[p-(2-methyllactoyl)phenoxy]ethyl 1,3-dioxo-2-isoindolineacetate having the following structure ##STR51## and 2-hydroxy-2-methyl-4'-[2-[p-(3-oxobutyl)phenoxy]ethoxy]-propiophenone having the following structure ##STR52##

An ink jet printer cartridge filled with ink comprising an ink jet print cartridge containing a mutable ink composition therein, said ink composition comprising:

• a colorant;
• a radiation transorber;
• a molecular includant;
• and
• a liquid vehicle;
• wherein the radiation transorber comprises a photoreactor covalently bonded to a wavelength selective sensitizer represented by the formula ##STR53## wherein at least one of R.sub.1 and R.sub.2 is an aryl group;
• when R.sub.1 is an aryl group, R.sub.2 is a hydrogen, alkyl, aryl, heterocyclic or phenyl group, the phenyl group optionally being substituted with an alkyl, halo, amino or thiol group;
• when R.sub.2 is an aryl group, R.sub.1 is a hydrogen, alkyl, aryl, heterocyclic or phenyl group, the phenyl group optionally being substituted with an akyl, halo, amino or thiol group;
• and
• wherein the molecular includant is covalently bonded to the radiation transorber.