UV Red Fluorescent EA Toner

A UV red fluorescent clear toner comprising a pigment containing a europium (III) complex in an amount of at least about 3 wt %, at least one amorphous resin, an optional crystalline resin, an aggregating agent, a saccharide or sugar acid, optionally a surfactant and optionally a wax, wherein the europium (III) complex is selected from the group consisting of tris(dibenzoylacetonato)-mono(phenanthroline)-europium (III);

• tris(dibenzoylmethane)-mono(phenanthroline)-europium (III);
• tris(dibenzoylmethane)-mono(5-aminophenanthroline)-europium (III);
• tris(dinapthoylmethane)-mono(phenanthroline)-europium (III);
• tris(4-bromobenzoylmethane)-mono(phenanthroline)-europium (III);
• tris(dibiphenoylmethane)-mono(phenanthroline)-europium (III);
• tris(dibenzoylmethane)-mono(4,7-diphenylphenanthroline)-europium (III);
• and tris(dibenzoylmethane)-mono(4,7-dimethylphenanthroline)-europium (III), and wherein the toner exhibits an absorption λmax of between about 330nm to 380 nm and an emission λmax of between about 612 nm to about 618 nm.

A method of preparing a UV red fluorescent toner comprising:

• contacting at least one amorphous resin, an optional crystalline resin, an optional color pigment, an aggregating agent, a saccharide or a sugar salt, an optional wax and at least one fluorescent pigment comprising a lanthanide complex to form a fluorescent latex;
• adding a metal ion flocculant to the latex in an amount of about 0.01 pph to about 0.5 pph metal ion to toner;
• aggregating said fluorescent latex to form a mixture, optionally with mixing, wherein said aggregating is carried out at less than about 40° C.;
• adding a saccharide or sugar acid to said aggregated mixture and adjusting pH to from about 7 to about 9.5;
• coalescing said mixture, wherein said coalescing is carried out at from about 64° C. to about 80° C.;
• and
• recovering the resulting fluorescent toner particles.