Embodiments of the present disclosure are directed to printing systems and methods that may include an ink composition including electrically charged ink particles dispersed in a hydrocarbon liquid and a multilayer film. The multilayer film may include a polymeric core layer; and one or more printing layers adjacent to the polymeric core layer. The one or more printing layers may include at least 50 wt. % of an ethylene vinyl acetate copolymer having acid and acrylate functional groups. The ethylene vinyl acetate copolymer having acid and acrylate functional groups may include from 0.5 wt. % to 4 wt. % methacrylic or acrylic acid; from 0.5 wt. % to 4 wt. % acrylate, from 7 wt. % to 40 wt. % vinyl acetate; and the balance ethylene, based on the total weight of the ethylene vinyl acetate copolymer having acid and acrylate functional groups.

A liquid toner for printing conductive traces is provided. The liquid toner includes a carrier liquid and toner particles dispersed in the carrier liquid. The toner particles include a low symmetry electrically conducting material dispersed in a pigment.

A method for coating pigment particles is provided, the method comprising heating a polymer resin in a carrier fluid to dissolve the polymer resin, suspending in the carrier fluid the pigment particles to be coated; and effecting precipitation of the polymer resin from the carrier fluid, such that a coating of the resin is formed on the pigment particles.

A method for coating pigment particles is provided, the method comprising heating a polymer resin in a carrier fluid to dissolve the polymer resin; suspending in the carrier fluid white pigment particles to be coated; and cooling the carrier fluid at a rate of 2° C./hr or less to effect precipitation of the polymer resin from the carrier fluid such that a coating of the resin is formed on the pigment particles, thereby producing the white liquid electrophotographic ink composition.

A method for producing a toner for developing an electrostatic charge image includes: performing first aggregation that involves, in a dispersion containing first amorphous resin particles, aggregating at least the first amorphous resin particles; performing second aggregation that involves, in a dispersion that contains second amorphous resin particles and first aggregated particles obtained by aggregating the first amorphous resin particles, aggregating the second amorphous resin particles around the first aggregated particles; and heating a dispersion that contains second aggregated particles obtained by aggregating the second amorphous resin particles around the first aggregated particles so as to fuse and coalesce the second aggregated particles and form toner particles, in which a volume-average particle diameter DB of the second amorphous resin particles is smaller than a volume-average particle diameter DA of the first amorphous resin particles, and the first amorphous resin particles have a glass transition temperature of 50° C. or higher, and the second amorphous resin particles have a glass transition temperature of 50° C. or higher and 63° C. or lower.

A method for producing a toner for developing an electrostatic charge image includes: performing first aggregation that involves, in a dispersion containing first amorphous resin particles, aggregating at least the first amorphous resin particles; performing second aggregation that involves, in a dispersion that contains second amorphous resin particles and first aggregated particles obtained by aggregating the first amorphous resin particles, aggregating the second amorphous resin particles around the first aggregated particles; and heating a dispersion that contains second aggregated particles obtained by aggregating the second amorphous resin particles around the first aggregated particles so as to fuse and coalesce the second aggregated particles and form toner particles, in which a volume-average particle diameter DB of the second amorphous resin particles is smaller than a volume-average particle diameter DA of the first amorphous resin particles, and the first amorphous resin particles have a glass transition temperature of 50° C. or higher, and the second amorphous resin particles have a glass transition temperature of 50° C. or higher and 63° C. or lower.

A method for producing a conductive liquid electrophotographic ink composition is described, the method comprising: heating a polymer resin in a carrier fluid to dissolve the polymer resin; adding conductive metallic pigment particles to be coated to the carrier fluid; cooling the carrier fluid to effect precipitation of the polymer resin from the carrier fluid such that a coating of the resin is at least partially formed on the conductive metallic pigment particles; reheating the suspension of partially coated conductive metallic pigment particles in the carrier fluid; and cooling the carrier fluid at a controlled rate to effect precipitation of the polymer resin from the carrier fluid such that a coating of the resin is formed on the conductive metallic pigment particles, thereby producing the conductive liquid electrophotographic ink composition.

Provided in one example herein is a liquid electrophotographic ink composition, comprising: a carrier fluid comprising a polymer; ink particles comprising pigment particles and a polymeric resin, the pigment particles comprising titanium dioxide Sand being distributed in the polymeric resin; and a charge director, wherein the ink particles have an average diameter of between about 10 μm and 50 μm; and the pigment particles are between about 10 wt % and about 50 wt % of the ink particles. Methods of making and using the ink composition are also provided.

A high opacity white ink containing a mica-based mineral with titania is provided. A method of manufacturing the high opacity white ink is also provided.

An ultraviolet-curable liquid developer contains a cationically polymerizable liquid monomer, a photoinitiator, and a toner particle insoluble in the cationically polymerizable liquid monomer. The cationically polymerizable liquid monomer is a vinyl ether compound, and the photoinitiator is a compound having a particular structure.