Tailored ink for piston driven electrostatic liquid drop...

Details Tailored ink for piston driven electrostatic liquid drop... Tailored ink for piston driven electrostatic liquid drop...

2005-04-19

2005-04-19

Klemanski, Helene (Department: 1755)

Compositions: coating or plastic

Coating or plastic compositions

Marking

C106S031270, C106S031320, C106S031490, C106S031580, C106S031430, C106S031590

Reexamination Certificate

active

06881250

ABSTRACT:
The present invention relates to an ink composition including water, a solvent, a solvent-soluble dye, and a surfactant, where the ink exhibits a stable liquid microemulsion phase at a first temperature and a second temperature higher than the first temperature and has a conductivity of at most about 200 μS/cm and a dielectric constant of at least about 60, and methods of making such ink compositions. The present invention also relates to a method of making an ink composition for use in a microelectromechanical system-based fluid ejector. The method involves providing a solution or dispersion including a dye or a pigment and adding to the solution or dispersion an additive which includes a material that enhances dielectric permittivity and/or reduces conductivity under conditions effective to produce an ink composition having a conductivity of at most about 200 μS/cm and a dielectric constant of at least about 60.

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