The present invention relates to a non-magnetic mono-component toner
composition and a preparation method thereof. Disclosed is a non-magnetic
mono-component toner composition prepared by coating a spherical organic
fine particle having a weight-average molecular weight (M.sub.w) of
250,000-1,600,000 and an average particle size of 50-500 nm, a
hydrophobic silica, and a metal oxide fine particle on a toner mother
particle. The non-magnetic mono-component toner composition of the
present invention ensures smooth toner supply because of good fluidity,
reduces PCR contamination and deterioration of image quality, enables
uniform toner layer formation on the development roller, prevents
blocking at the blade of the development roller, and solves the low
temperature double image problemin the non-imaging region at a low
temperature. Therefore, it can be useful for an image printing apparatus
adopting the non-magnetic mono-component development system in which the
developing roller contacts the photoreceptor.