Fluorescent pigment concentrates

Process for preparing a low plate-out fluorescent pigment concentrate comprising the steps of dry blending

• (a) a pigment comprising a polymer selected from the group consisting of polyesters, melamine-formaldehyde resins and triazine-formaldehyde resins and a fluroescent dye, and
• (b) a copolymer of ethylene and carbon monoxide, selected from the group consisting of copolymers having a melt viscosity in the range of about 50 to about 20,000 centipoise at 150.degree. C. and copolymers having a melt index in the range of about 0.2 up to 100 g/10 min at 190.degree. C., said copolymer containing carbon monoxide residue in the amount of about 14-30% by weight, said copolymer being present in sufficient amount to disperse said pigment, said process comprising dry blending said pigment and said polyolefin, melt blending said pigment and said polyolefin at a temperature of about 300.degree. F. to about 425.degree. F., and optionally forming the melt-mixed material into a form useful for fabrication.