US Patent 9946179 Toner

A toner comprising a binder resin, a crystalline material, and a colorant, wherein, in a cross section image of the toner, when R (μm) is a long axis of the toner, r (μm) is a long axis of a crystalline material domain, domain A is a domain satisfying formula (ii), and domain B is a domain satisfying formula (iii), the toner in which the domain A and the domain B are both present is at least 50 number %; an number average diameter RAvg of the long axis of the toner satisfies formula (i); and a number of domain B per toner cross section of one toner is 20 to 300.4 μm≤RAvg≤12 μm  (i)0.125≤r/R≤0.375  (ii)0.000625≤r/R≤0.0625  (iii)