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Microstructured effect pigments from

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By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

Patent No. U.S. 7,264,670 B2
Merck has obtained a patent for a colored flake-form effect pigment comprised of one or more layers, where at least one of the layers comprises one or more colorants or is itself a colorant and at least one of the layers has a groove or grid structure, wherein the groove or grid structure has 250-2000 nm separations between adjacent grooves or grids.

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