Method of improving pigment fluorescence
AssigneeCiba Specialty Chemicals Corporation
InventorsIain Fraser, Sharon Wilson, Ian Macpherson
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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.
Claims4
1-10. (canceled)
Method of enhancing fluorescence of marking compositions, which method comprises treating an organic pigment with a surfactant selected from the group consisting of alkylaryl sulphonates, amines and alkylphenol ethoxylates, and adding the surfactant-treated pigment to the marking composition.
Dependencies are inferred from the claim text.