Ink jet ink composition
AssigneeXaar Technology Limited
InventorsMary Catherine Ambrose Griffin, John Philip Tatum, Jill Woods
Life of this patent
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Abstract
A dispersion ink for ink jet printing and which is stable and produces good quality print on plain paper for extended periods of time without the need to interrupt printing to clean the print head, comprises a diluent containing a non-polar component, a pigment and a dispersant for stabilizing the dispersion of the pigment in the diluent, and has a polar solubility parameter greater than 0 but not greater than 7.0 MPa.sup.1/2 and a dewetting velocity of at least 100 .mu.m.sec.sup.-1, measured on a surface having a surface energy of 10.+-.1 mN.m.sup.-1.
Claims13
A stable ink jet ink composition comprising a diluent, a pigment, and a dispersant for stabilizing the dispersion of the pigment in the diluent, said diluent containing a non-polar component and a polar component, said non-polar component forming a major component of the diluent and said polar component being present in amount of at least 5% by weight of the diluent but such that said composition has a polar solubility parameter not greater than 7 MPa.sup.1/2, said composition further having a dewetting velocity of at least 100 .mu.m.sec.sup.-1 on a surface having a surface energy of 10.+-.1 mN.m.sup.-1.
Dependencies are inferred from the claim text.