Abstract: A toner includes: toner base particles including a binder resin, a colorant, an inorganic filler, and a release agent; and an external additive. An average circularity of the toner is 0.974 or more but 0.985 or less. A surface roughness parameter Sz of a surface of the toner is 200 nm or more but 500 nm or less, the surface roughness parameter Sz being measured with an atomic force microscope (AFM).

Abstract: A wick includes a porous body. The porous body includes a plurality of bubbles, a plurality of composite cells, and a plurality of communication holes. The plurality of bubbles has sizes in a range from 0.1 ?m to 50 ?m, both inclusive, in a cross section obtained when the porous body is cut. The plurality of composite cells is formed by spherical bubbles partially overlapping each other. Bubbles of pore sizes from 5 ?m to 10 ?m, both inclusive, are most present among the plurality of composite cells. The plurality of communication holes of 5 ?m or smaller is between the plurality of bubbles.