An aqueous ink comprising containing a colorant and a radiation-curable oligomer or polymer containing H-active groups bonded to the oligomer or polymer backbone, some or all of whose hydrogen atoms have been substituted by radicals of a N-hydroxyalkyl acrylamide. The article includes a substrate body having an inside surface and a plurality of alkaline earth salt particles embedded within at least a portion of the inside surface but not extending through the thickness of the article such that no separate binder material is needed to affix the particles. A portion of the sidewall of each ring is not soldered thus insuring that at least part of the ring stays flexible. The first and second heat conductive fins extract heat energy from the electrically non-conductive oil. to accessdesired functionality of the device or access a desired service. The path size switching plate limits the paper transport path in a direction of thickness of the recording paper while the recording paper is being conveyed in a paper supply direction, preventing the recording paper from getting jammed.