Abstract: The present invention provides: hollow particles which enable a lower dielectric constant and a lower dielectric loss tangent of a resin composition and a production method therefor. The hollow particles of the present invention have a shell portion formed by a polymer of a monomer component including a divinyl aromatic compound and a monovinyl aromatic compound and a hollow portion surrounded by the shell portion, in which a dielectric loss tangent measured by cavity resonance method (frequency: 10 GHz (room temperature)) is 1.00×10?3 or less. The hollow particles can be produced by mixing the monomer component and a predetermined hydrophobic solvent, by further mixing water, by polymerizing the monomer component in an emulsion liquid obtained, and by washing a resulting polymer with water and an organic solvent.

Abstract: The recording sheet is formed by coating colored sheets with an opacifying compound prepared by mixing an aqueous suspension of polymer particles embodying internal voids dispersed with a water base coating material.