Gray ink composition and method of making the same

A gray ink composition includes an ink vehicle having a black pigment and at least one color pigment dispersed therein. An anionic dispersant is: a) dispersed in the ink vehicle; b) associated with at least a portion of a surface of at least one of the dispersed black pigment or the at least one dis...

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Bibliographische Detailangaben
Hauptverfasser:	YUE SHUNQIONG, KELLY-ROWLEY ANNE M, DOUMAUX HOWARD A
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	A gray ink composition includes an ink vehicle having a black pigment and at least one color pigment dispersed therein. An anionic dispersant is: a) dispersed in the ink vehicle; b) associated with at least a portion of a surface of at least one of the dispersed black pigment or the at least one dispersed color pigment; and/or c) combinations thereof. At least one of the black pigment or the color pigment(s) has an anionic surfactant that is associated with at least another portion of the surface thereof.