Patent ID: 8211605

Claim:
A toner comprising at least: a binder resin; and filler comprising a layered inorganic compound, wherein the layered inorganic compound is a smectite group clay mineral cleaved to form particles in the toner, and the particles have a breadth of 0.5 nm to 4 nm, and a length of 10 nm to 90 nm, and wherein the smectite group clay mineral is a synthetic smectite expressed by the following general formula 1: Na 0.1-1.0 Mg 2.4-2.9 Li 0.1-0.6 Si 3.5-4.5 O 9.5-10.5 (X) 1.5-2.5 General formula 1 wherein X denotes at least one selected from OH and F, and wherein the synthetic smectite is obtained by a process comprising reacting a mixed solution of silicic acid and magnesium salt with an alkaline solution to synthesize a silicon-magnesium complex, removing electrolyte which is a by-product of the reaction, adding lithium ions together with at least one selected from sodium ions and fluorine ions to the silicone-magnesium complex so as to subject the mixture to a hydrothermal reaction.