Patent ID: 8232034

Claim:
An electrophotographic toner comprising a binder, a colorant and a releasing agent, wherein the electrophotographic toner comprises strontium (Sr), iron (Fe), titanium (Ti), and silicon (Si) containing particles; wherein [Sr], [Fe], [Ti] and [Si] denote the intensities of Sr, Fe, Ti, and Si in the electrophotographic toner, respectively, as measured by X-ray fluorescence spectrometry, wherein the [Sr]/[Fe] ratio is in the range of about 5.0×10 −1 to about 4.5, the [Ti]/[Fe] ratio is in the range of about 5.0×10 −1 to about 8.1×10 −1 , and wherein the [Si]/[Fe] ratio is in the range of about 2.0×10 −3 to about 4.0×10 −3 .