Image forming method, image forming device, and light-irradiation-fusible toner set

An image forming device, comprising:

• at least one image holding member;
• at least one electrostatic charge image forming device that forms at least one electrostatic charge image on a surface of the at least one image holding member;
• at least one developing device that develops the at least one electrostatic charge image using a light-irradiation-fusible black toner and a light-irradiation-fusible color toner to form a black toner image and a color toner image;
• at least one transfer device that transfers the black toner image and the color toner image to a surface of a receiving body;
• and
• at least one light-irradiation fusing device that fixes the black toner image and the color toner image transferred to the surface of the receiving body by light-irradiation fusing with irradiation of light in the infrared region,
• the black toner being melted by the irradiation of the light in the infrared region in the light-irradiation fusing,
• the color toner containing an infrared absorber,
• a light absorptance of the color toner at a peak wavelength of the light in the infrared region irradiated in the light-irradiation fusing being from about 79% to about 98% of a light absorptance of the black toner at the peak wavelength, and
• the color toner having a color difference ΔE represented by the following Equation (1) of about 20 or less,
• ΔE{(L1−L2)2+(a1−a2)2+(b1−b2)2}1/2, Equation (1)
• in Equation (1), L2, a2, and b2 representing an L value, an a value, and a b value of the light-irradiation-fusible color toner in a fixed image, and L1, a1, and b1 representing an L value, an a value, and a b value of a color toner obtained by excluding the infrared absorber from the light-irradiation-fusible color toner, in a fixed image.

A light-irradiation-fusible toner set, comprising:

• a light-irradiation-fusible black toner that absorbs light in the infrared region;
• and
• a light-irradiation-fusible color toner that absorbs light in the infrared region,
• the color toner containing an infrared absorber,
• a light absorptance of the color toner at a wavelength corresponding to a maximum light absorption peak in the infrared region being from about 79% to about 98% of a light absorptance of the black toner at the wavelength, and
• the color toner having a color difference ΔE represented by the following Equation (1) of about 20 or less,
• ΔE{(L1−L2)2+(a1−a2)2+(b1−b2)2}1/2, Equation (1)
• in Equation (1), L2, a2, and b2 representing an L value, an a value, and a b value of the light-irradiation-fusible color toner in a fixed image, and L1, a1, and b1 representing an L value, an a value, and a b value of a color toner obtained by excluding the infrared absorber from the light-irradiation-fusible color toner, in a fixed image.