Organic fine particle

An organic particle comprising a core polymer and a shell polymer, wherein

• the core polymer has a Tg or a melting point of 15° C. or more,
• the core polymer has a water contact angle of 100° or more,
• all monofunctional monomers constituting the core polymer are a hydrophobic core monomer of which homopolymer has a water contact angle of 100° or more,
• the shell polymer has a Tg or a melting point lower than Tg or the melting point of the core polymer,
• the shell polymer has a water contact angle of less than 100°,
• all monofunctional monomers constituting the shell polymer are a water-insoluble shell monomer of which homopolymer is water-insoluble
• the core polymer is a non-fluorine polymer,
• the water-insoluble shell monomer has at least one hydrocarbon group having 1 to 10 carbon atoms or fluoroalkyl group having 1 carbon atom, and
• the organic particle has an average particle size of 10 nm to 5,000 nm.