Ink jet inks containing nanoparticles of organic pigments

Details Ink jet inks containing nanoparticles of organic pigments Ink jet inks containing nanoparticles of organic pigments

1995-11-30

1997-10-21

Klemanski, Helene

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 20D, C09D 1102

Patent

active

056791380

ABSTRACT:
A process for making ink jet inks, comprising the steps of:
(A) providing an organic pigment dispersion containing a pigment, a carrier for the pigment and a dispersant;
(B) mixing the pigment dispersion with rigid milling media having an average particle size less than 100 .mu.m;
(C) introducing the mixture of step (B) into a high speed mill;
(D) milling the mixture from step (C) until a pigment particle size distribution is obtained wherein 90% by weight of the pigment particles have a size less than 100 nanometers (nm);
(E) separating the milling media from the mixture milled in step (D); and
(F) diluting the mixture from step (E) to obtain an ink jet ink having a pigment concentration suitable for ink jet printers.

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