▎ 摘　　要

NOVELTY - Organic pigment surface coating comprises graphene oxide aqueous solution, prepared by contacting the chemically reduced graphene oxide aqueous solution with an organic pigment dispersed in water to achieve surface coating of the organic pigment, which is a product of graphene oxide or chemically reduced graphene oxide coated organic pigment, is claimed. USE - The graphene oxide and graphene coated organic pigment particles is useful in preparing aqueous printing ink and aqueous coatings (claimed). ADVANTAGE - The coating: utilizes the hydrophobic part of graphene oxide substrate, preferably benzene ring structure, which undergoes pi-pi interaction; has good dispersing property and heat resistance in an aqueous solvent due to graphene oxide substrate hydrophilic group. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphene oxide or chemically reduced graphene oxide coated organic pigment particles prepared by the above method, having higher hydrophilicity and thermal stability.