A liquid developer containing toner particles and a carrier liquid, the toner particles containing a resin component, wherein the resin component includes a resin A and a resin B, the resin A has a unit Y1 represented by the formula (1) and a unit Y2 represented by the formula (2), the resin B has a unit Y3 represented by the formula (3) and a unit Y4 selected from the units represented by the formulae (4) to (8), the resin A has a unit Y2 content of 1% to 20% by mass, the resin B has a unit Y3 content of 5% to 90% by mass, the resin component has a resin A content of 50% to 99% by mass, and the resin component has a resin B content of 1% to 50% by mass.

Described herein is a printed photovoltaic cell comprising an anode; an LEP printed cathode; and an LEP printed photovoltaic layer disposed between the anode and the cathode. The photovoltaic layer comprises a material with a perovskite structure having a chemical formula selected from ABX.sub.3 and A.sub.2BX.sub.6 and a thermoplastic resin comprising a copolymer of an alkylene monomer and a monomer having acidic side groups; and/or a copolymer of an alkylene monomer and an ethylenically unsaturated monomer comprising an epoxide; and/or a copolymer of an alkylene monomer, an ethylenically unsaturated monomer comprising an epoxide, and a monomer selected from a monomer having acidic side groups, a monomer having ester side groups and a mixture thereof. The printed cathode comprises: a thermoplastic resin; and electrically conductive metal particles. Also described herein is a method of producing the printed photovoltaic cell and an ink set for use in the method.

A method of producing a material with a perovskite structure on a substrate by liquid electrophotographic printing comprises: either liquid electrophotographically printing onto the substrate a composition comprising a dispersion of a salt AX and a thermoplastic resin in a carrier liquid; liquid electrophotographically printing onto the substrate a composition comprising a dispersion of a salt selected from BX2 and BX4 and a thermoplastic resin in a carrier liquid; and heat treating the printed compositions to form the material with a perovskite structure; or liquid electrophotographically printing onto the substrate a composition comprising a dispersion of a material with a perovskite structure and a thermoplastic resin in a carrier liquid to form the material with a perovskite structure; wherein A is a cation, B is a cation and X is an anion; wherein the thermoplastic resin comprises a copolymer of an alkylene monomer and a monomer having acidic side groups.

A liquid electrostatic ink composition is described comprising carbon nanotubes; a resin; and a dispersant comprising at least one polysiloxane in an amount from about 0.01 wt. % to about 30 wt. % based on the combined weight of carbon nanotubes and resin. In some examples, the polysiloxane is a trisiloxane and has at least one polyether group. Also described is an environmental sensor comprising a printed conductive trace formed by printing an electrophotographic ink composition comprising carbon nanotubes, a resin and a dispersant. The dispersant may be an organic hydrocarbon based dispersant, such as a basic amine dispersant, or a polysiloxane dispersant.

A liquid electrophotographic ink composition is disclosed herein. One example of the liquid electrophotographic ink composition includes a resin, a liquid carrier, a pigment chosen from titanium oxide, and a spacer chosen from barium sulfate, calcium carbonate, clay, magnesium silicate and mixtures thereof, in an amount from 5 to 15 wt. % of the total solids of the composition. A method for making a liquid electrophotographic ink composition is also disclosed herein.

A liquid developer containing a liquid carrier and a toner particle that is insoluble in the liquid carrier, wherein a particular substructure is bonded through a covalent bond to a surface of the toner particle, and a method of producing a liquid developer containing a liquid carrier and a toner particle that is insoluble in the liquid carrier, the method comprising a step (I) of covalently bonding, to a surface of the toner particle, a compound having a particular substructure.

Herein is described a method of printing on a textile substrate. The method may comprise: a. applying a primer comprising a cross-linkable primer resin onto a surface of the textile substrate to form a primer layer; b. electrophotographically printing onto the primer layer an electrostatic ink composition comprising a cross-linkable thermoplastic resin to form a printed layer; c. applying a cross-linking composition comprising a cross-linking agent to the printed layer, wherein i. the cross-linking agent penetrates into at least the electrostatic ink composition and the primer layer; and/or ii. the cross-linking agent is a non-isocyanate agent; and d. activating the cross-linking agent. Printed textiles are also described.

Herein is described a method of providing a printed label. The method comprises: providing a printed label substrate having disposed thereon an electrostatically printed ink; applying a UV curable overcoat composition to the printed ink, wherein the UV curable overcoat composition comprises (i) a component selected from UV curable monomers and UV curable oligomers, and (ii) a slip agent; curing the overcoat composition under UV irradiation with an output power of 2500 W or less. Printed labels and an ink and overcoat composition set are also described herein.

The present disclosure discloses a liquid electrophotographic ink. The ink can include (A) a liquid vehicle; (B) at least one colorant; (C) a resin comprising an ethylene acid copolymer; (D) an ethylene/(meth)acrylic acid C1-10 alkyl ester copolymer selected from the group consisting of an ethylene/methyl acrylate copolymer and an ethylene/butyl acrylate copolymer; and (E) a condensation product of urea and aldehyde.

The present invention relates to a liquid developer containing toner particles containing a colorant and a binder resin containing a polyester resin; and an insulating liquid, wherein the polyester resin includes a constituent unit derived from an alcohol component and a constituent unit derived from a carboxylic acid component, and the toner particles contain an acid-modified product A of a polymer of an α-olefin having 3 or more and 18 or less carbon atoms.