Aqueous resin based inkjet inks

An inkjet ink comprising:

• an aqueous medium;
• and
• capsules including a polymeric shell surrounding a core;
• wherein
• the aqueous medium includes one or more surfactants selected from the group consisting of fatty acid salts, ester salts of a higher alcohol, alkylbenzene sulphonate salts, sulphosuccinate ester salts and phosphate ester salts of a higher alcohol, ethylene oxide adducts of a higher alcohol, ethylene oxide adducts of an alkylphenol, ethylene oxide adducts of a polyhydric alcohol fatty acid ester, and acetylene glycol adducts and ethylene oxide adducts thereof;
• the capsules are dispersed in the aqueous medium by a dispersing group covalently bonded to the polymeric shell;
• the core includes a photoinitiator and one or more chemical reactants that form a reaction product upon application of UV light;
• the capsules have an average particle size of no more than 4 μm as determined by dynamic laser diffraction;
• the photoinitiator is a diffusion hindered photoinitiator selected from the group consisting of multifunctional photoinitiators, oligomeric photoinitiators, polymeric photoinitiators, and polymerizable photoinitiators;
• and
• the dispersing group is selected from the group consisting of a carboxylic acid or salt thereof, a sulfonic acid or salt thereof, a phosphoric acid ester or salt thereof, a phosphonic acid or salt thereof, an ammonium group, a sulfonium group, and a phosphonium group.