Patent ID: 7550241

Claim:
A mono-component toner composition with positive charge comprising: i) 100 parts by weight of a magnetic toner particle comprising a binder resin, a magnetic component, and a charge control agent with positive charge; ii) 0.1 to 0.5 parts by weight of a hydrophobic silica with negative charge having 100 to 150 m 2 /g of specific surface area; iii) 0.05 to 0.4 parts by weight of a fluorinated organic fine powder, the fluorinated organic powder having average particle size of 0.5 to 4.0 μm; and iv) 0.1 to 0.4 parts by weight of a metal oxide fine powder consisting of 20 to 80 wt % of tin oxide and the remaining percentage of at least one metal oxide selected from the group consisting of titanium dioxide, aluminum oxide, zinc oxide, magnesium oxide, cerium oxide, iron oxide, and copper oxide.