Liquid electrophotographic ink compositions

An ink set comprising:

• a liquid electrophotographic ink composition comprising a dispersion of a material with a perovskite structure and a thermoplastic resin in a carrier liquid;
• or
• a liquid electrophotographic ink composition comprising a dispersion of a salt AX and a thermoplastic resin in a carrier liquid;
• and
• a liquid electrophotographic ink composition comprising a dispersion of a salt selected from BX2 and BX4 and a thermoplastic resin in a carrier liquid;
• wherein the material with a perovskite structure has a chemical formula selected from ABX3 and A2BX6;
• 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;
• 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.

A printed substrate comprising:

• a substrate;
• and
• a liquid electrophotographically printed composition comprising a thermoplastic resin and a material with a perovskite structure disposed on the substrate;
• wherein the material with a perovskite structure has a chemical formula selected from ABX3 and A2BX6;
• wherein A is a cation, B is a cation and X is an anion;
• and
• wherein the thermoplastic resin comprises:
• 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.