Abstract: The present invention relates to a process for producing a toner for electrophotography that is excellent in the low-temperature fusing property, the initial image quality after storage, and the document offset property. A process for producing a toner for electrophotography, including step 1: melt-mixing a mixture containing a crystalline resin (C) and ester wax (W) having a dipentaerythritol unit as a constitutional component, wherein a difference |Cmp?Wmp| between a melting point Cmp of the crystalline resin (C) and a melting point Wmp of the ester wax (W) is 30° C. or less, and the melt-mixing is performed at a temperature Kt that is the melting point Cmp or more and the melting point Wmp or more.

Abstract: The present invention relates to a process for producing a toner for electrophotography that is excellent in the low-temperature fusing property, the initial image quality after storage, and the document offset property. A process for producing a toner for electrophotography, including step 1: melt-mixing a mixture containing a crystalline resin (C) and ester wax (W) having a dipentaerythritol unit as a constitutional component, wherein a difference |Cmp?Wmp| between a melting point Cmp of the crystalline resin (C) and a melting point Wmp of the ester wax (W) is 30° C. or less, and the melt-mixing is performed at a temperature Kt that is the melting point Cmp or more and the melting point Wmp or more.

Abstract: A copper(I) complex is represented by the following Formula (1): [Cua(XS)b(L)c], wherein, L is triphenylphosphine, acetonitrile, tri-iso-butylphosphine, or a substituted or unsubstituted heterocyclic compound having 5 to 18 carbon atoms, a is an integer from 2 to 6, b is an integer from 2 to 6, c is an integer from 0 to 6, X is a substituted or unsubstituted aryl group, substituted or unsubstituted carbazole, or PR3, where R is a substituted or unsubstituted phenyl group or a substituted or unsubstituted cyclohexyl group.