Radiation curable ink containing fluorescent nanoparticles

A radiation curable ink composition comprising:

• a radiation curable material that is capable of being cured via polymerization,
• a polymeric dispersant selected from the group consisting of derivatives of rosin natural products, acrylic-based polymers, styrene-based copolymers, copolymers of α-olefins, copolymers of vinyl pyridine, vinyl imidazole, vinyl pyrrolidinone, polyester copolymers, polyamide copolymers, and copolymers of vinyl acetals,
• a non-fluorescent colorant including pigment, dye, mixtures of dyes, mixtures of pigments, mixtures of dyes and pigments, and the like, and
• a fluorescent nanoparticle composition, wherein the fluorescent nanoparticle composition comprises a fluorescent organic nanoparticle obtained by preparing a polymer latex.

A radiation curable ink composition comprising:

• a radiation curable material that is capable of being cured via polymerization,
• a polymeric dispersant selected from the group consisting of derivatives of rosin natural products, acrylic-based polymers, styrene-based copolymers, copolymers of α-olefins, copolymers of vinyl pyridine, vinyl imidazole, vinyl pyrrolidinone, polyester copolymers, polyimide copolymers, and copolymers of vinyl acetals,
• an optional non-fluorescent colorant including pigment, dye, mixtures of dyes, mixtures of pigments, mixtures of dyes and pigments, and the like, and
• a fluorescent nanoparticle composition, wherein the fluorescent nanoparticle composition comprises a fluorescent organic nanoparticle obtained by emulsion-polymerization.