Abstract: A radiation polymerizable composition comprising: (A) a donor/acceptor component for forming a charge transfer complex said component being selected from the group consisting of: (iii) a bifunctional compound having an electron donor group and an electron withdrawing group and a polymerizable unsaturated group; (iv) a mixture of (a) at least one unsaturated compound having an electron donor group and a polymerizable unsaturated moiety; and (b) at least one unsaturated compound having an electron acceptor group and a polymerizable unsaturated group; and (B) a binder polymer composition.