Abstract: An ink includes a volatile solvent, an inorganic hollow particle, and a calcium ion, wherein the calcium ion has a proportion of from 0.5 to 250 ppm in the ink and the inorganic hollow particle has a 50 percent cumulative particle diameter of from 50 to 350 nm.

Abstract: An active energy ray curable composition includes an inorganic pigment and a polymerizable monomer, wherein the inorganic pigment is carbon black having a ratio of the amount of hydrophilic functional group to the specific surface area in a range of from 7 ?mol/m2 to 42?mol/m2 or a metal oxide having a ratio of the amount of sulfonic acid group to the specific surface area in a range of from 7 ?mol/m2 to 85 ?mol/m2, wherein the active energy ray curable composition has a viscosity change rate (?V) represented by the following relation 1 from ?10 percent by mass to +10 percent by mass: ?V(%)=|V?V0|/V0×100??relation 1, where V0 represents an initial viscosity at 25 degrees C. and V represents a storage viscosity after the active energy ray curable composition is stored still at 70 degrees C. for 14 days.

Abstract: An active-energy-ray-curable composition including: a magenta pigment; a polymerizable compound; and a pigment adsorption component, an amount of the pigment adsorption component (A0) adsorbed onto 100 mg of the magenta pigment being from 10 mg through 60 mg.

Abstract: An active energy ray curable composition is provided. The active energy ray curable composition includes a pigment including a titanium oxide, a dispersant, and a polymerizable compound. At least a part of the dispersant is adsorbed to the pigment at an adsorption rate of from 5 to 80 mg per 1 g of the pigment.

Abstract: An active-energy-ray-curable composition, which satisfies the following relationships of absorbance: a ratio of absorbance at a wavelength of 400 nm to absorbance at a wavelength of 750 nm is 1.4 or more but 1.6 or less; and a ratio of absorbance at a wavelength of 365 nm to absorbance at a wavelength of 500 nm is 1.2 or less.

Abstract: An active-energy-ray-curable composition including: a cyan pigment; and a polymerizable compound, wherein a ratio of absorbance at a wavelength of 385 nm to absorbance at a wavelength of 620 nm is 0.65 or less.

Abstract: An active energy ray curable composition includes an inorganic pigment and a polymerizable monomer, wherein the inorganic pigment is carbon black having a ratio of the amount of hydrophilic functional group to the specific surface area in a range of from 7 ?mol/m2 to 42 ?mol/m2 or a metal oxide having a ratio of the amount of sulfonic acid group to the specific surface area in a range of from 7 ?mol/m2 to 85 ?mol/m2, wherein the active energy ray curable composition has a viscosity change rate (?V) represented by the following relation 1 from ?10 percent by mass to +10 percent by mass: ?V (%)=|V?V0|/V0×100??relation 1, where V0 represents an initial viscosity at 25 degrees C. and V represents a storage viscosity after the active energy ray curable composition is stored still at 70 degrees C. for 14 days.

Abstract: An electrophotographic photoreceptor is disclosed. The electrophotographic photoreceptor includes a resin substrate including a carbon nanotube; and a photosensitive layer located overlying the substrate. In addition, a method for producing an electrophotographic photoreceptor is disclosed. The method includes forming a resin substrate by molding a resin forming material including a carbon nanotube; and forming a photosensitive layer overlying the resin substrate.

Abstract: An electrophotographic photoconductor including: an electroconductive substrate; a photoconductive layer; and a surface layer, the photoconductive layer and the surface layer being laid over the electroconductive substrate, wherein the surface layer is a crosslinked layer which is cured by irradiating with light energy a composition containing a radical polymerizable monomer having no charge transporting structure, a radical polymerizable compound having a charge transporting structure and a photopolymerization initiator, and wherein the radical polymerizable compound having a charge transporting structure has a ratio Ae/As of 0.7 or higher where Ae denotes absorbance at an absorption peak wavelength ? after the radical polymerizable compound having a charge transporting structure is irradiated with light energy and As denotes absorbance at an absorption peak wavelength ? before the radical polymerizable compound having a charge transporting structure is irradiated with light energy.

Abstract: An electrophotographic photoreceptor is disclosed. The electrophotographic photoreceptor includes a resin substrate including a carbon nanotube; and a photosensitive layer located overlying the substrate. In addition, a method for producing an electrophotographic photoreceptor is disclosed. The method includes forming a resin substrate by molding a resin forming material including a carbon nanotube; and forming a photosensitive layer overlying the resin substrate.