The present invention relates to negative-working imageable elements that
can be used for the manufacture of printing plates. These imageable
elements can be developed on on-press by the action of a lithographic
printing ink used in combination with either water or a fountain
solution. The imageable elements comprise an imageable layer that is not
removable in water or fountain solution alone. The imageable layer
includes a free radically polymerizable compound, a free radical
initiator composition, an infrared radiation absorbing compound, and a
polymeric binder comprising poly(alkylene oxide) pendant groups, and
preferably additionally pendant cyano groups.