Abstract: A toner set has a white toner and a color toner, in which in a case where Cw [mg/L] represents an amount of a cation on a surface of the white toner, measured by ion chromatography, and Cc [mg/L] represents an amount of a cation on a surface of the color toner, measured by ion chromatography, the toner set satisfies Conditions (1) and (2). 0.3 mg/L?Cc?1.2 mg/L??(1) (Cw/Cc)?0.

Abstract: An electrostatic image developing white toner includes white toner particles including a binder resin and a white coloring agent; and an external additive including poly(meth)acrylate particles, wherein the white toner particles have a volume-average particle size D50W of 6.0 ?m or more and 10 ?m or less, a ratio of the white toner particles having a particle size of 3.2 ?m or less relative to all the white toner particles is 0.5 vol % or more and 3 vol % or less, the white toner particles have a specific surface area Sw of 0.7 cm2/g or more and 1.2 cm2/g or less, and an external addition amount of the poly(meth)acrylate particles relative to the white toner particles is 0.1 mass % or more and 2.0 mass % or less.

Abstract: An electrostatic charge image developing toner set contains a white toner that contains white toner particles including a binder resin, a white colorant, and a release agent, and a non-white color toner that contains color toner particles including a binder resin, a color colorant, and a release agent, in which, in observation of cross sections of the white toner particles and the color toner particles, in a case where a proportion of an area of a domain of a release agent present in a surface layer region from a surface of the white toner particles to a depth of 1 ?m or less with respect to an area of all domains of the release agent present in a cross section of the white toner particles is represented by WW, and a case where a proportion of an area of a domain of a release agent present in a surface layer region from a surface of the color toner particles to a depth of 1 ?m or less with respect to an area of all domains of the release agent present in a cross section of the color toner particles is represe

Abstract: In continuously forming color display layer on the surface of the stainless steel strip, potential difference between the strip immersed in the oxidizing solution and a reference electrode is utilized for controlling the thickness, or color tone, of the color display layer, namely, the relationship between the thickness of the color display layer and the potential difference mentioned above is measured first, followed by continuously immersing a strip of the same kind in the oxidizing solution for forming a color display layer on the surface of the strip. The difference in thickness between the actually formed color display layer and a desired color display layer is converted into the difference in potential difference based on the above-noted relationship and the immersion time of the strip in the oxidizing solution is controlled on the basis of said difference in potential difference.