Method of improving pigment fluorescence

Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...

Reexamination Certificate

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C106S493000, C106S499000, C534S573000, C534S581000

Reexamination Certificate

active

06923856

ABSTRACT:
A process for the preparation of organic pigments with enhanced fluorescence, which process comprises treating said pigments with a surfactant, and to the fluorescent organic pigments obtained by said process. The pigments according to the present invention can be used in marking applications, wherein durable fluorescence is required.

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CAS Registry No. 5468-75-7, “Pigment Yellow 14” (no date).
CAS Registry No. 15541-56-7, “Pigment Yellow 12” (no date).
CAS Registry No. 14569-54-1, “Pigment Yellow 63” (no date).
CAS Registry No. 6505-28-8, “Pigment Orange 16” (no date).

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