Patent ID: 6060537
Filing Date: 2000-05-09
Classification: C09D,Y10S

Abstract:
An improved water based ink composition which can be used effectively in various ink jet printing arrangements and on a surface of a variety of nonporous substrates, said water based ink composition being resistant to both smearing and running when contacted by liquids after application to and subsequent drying on such surface of such nonporous substrates, said water based ink composition comprising:(a) a preselected dye material having a predetermined color, said preselected dye material being present in said water based ink composition generally in a range of between about 0.1 weight percent and about 10.0 weight percent;(b) water present in said water based ink composition generally in a range of between about 50.0 weight percent and about 70.0 weight percent;(c) a water compatible organic solvent compound for dissolving said preselected dye material therein, said water compatible organic solvent compound being present in said water based ink composition generally in a range of between about 10.0 weight percent and about 30.0 weight percent;(d) a water miscible film forming polymer resin neutralized to a pH of greater than about 7, said water miscible film forming polymer resin being present in said water based ink composition generally in a range of between about 10.0 weight percent and about 30.0 weight percent;(e) said water based ink composition exhibiting a surface tension generally in a range of between about 20 dynes and about 50 dynes; and(f) said water based ink composition having a viscosity generally in a range of between about 1 centipoise and about 50 centipoise.