Pigmented jet inks
OwnerRichard M. Podhajnyinventor
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Abstract
The present invention is directed to ink compositions which are resistant to agglomeration. The ink compositions include a dispersion containing pigment particles having a particle size of less than about 1 micron, a dispersing resin, a base; and water. Methods of preparing the ink compositions and applying them to various surfaces are also disclosed.
Claims21
An ink composition comprising a dispersion containing
- a) pigment particles having a particle size of less than about 1 micron;
- b) a dispersing resin;
- c) a base;
- and
- d) water.
16 The ink composition of claim 1, further comprising an emulsion binder.
The ink composition of claim 16, wherein said emulsion binder is S C Johnson J-DCF 3030 or Joncryl J-624.
The method of preparing an ink composition comprising:
- a) providing a chip dispersion of pigment particles having a particle size of less than about 1 micron;
- b) placing said chip dispersion in an aqueous, alkaline medium;
- c) adding a binder to said alkaline medium;
- and
- d) mixing the combination of ingredients until a substantially homogeneous mixture is obtained.
A process of printing on food or pharmaceutical items with a jet ink composition, comprising projecting a stream of droplets of a jet ink composition of claim I onto said food or pharmaceutical items and controlling the direction of the stream so that the droplets are caused to form the desired printed message on the surface of said items.
Dependencies are inferred from the claim text.