Active energy ray curable composition, ink, composition stored container, and two-dimensional or three-dimensional image forming apparatus

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 μmol/m2 to 42 μmol/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 μmol/m2 to 85 μmol/m2, wherein the active energy ray curable composition has a viscosity change rate (ΔV) represented by the following relation 1 from −10 percent by mass to +10 percent by mass: ΔV (%)=|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.

Dependencies are inferred from the claim text.