Polymer Coated Pigments That Spill Less Ink

A NEW UNIT OF BRITAIN'S General Electric Co. PLC is developing an ink concentrate that delivers sharper images at a lower price per page. MICAP Technology Corp. in Niles, Ill., a year-old spin-off of GEC's A.B. Dick Co., uses fine grains of pigment less than 10% the diameter of standard particles. Then it coats the pigment grains with a polymer. The substance, the composition of which MICAP won't reveal while patent applications are pending, bonds to the chemically active sites on the particles so they don't cling to one another, a common problem in inks that results in uneven coverage.

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