Abstract: A method for locking two surfaces relative to one another is disclosed. The surfaces can be gelatin, paper, glass, nylon, or other surfaces having hydroxyl or amine functionality. The method involves bringing the two surfaces together and irradiating the interface between the two with radiation at a wavelength which causes photopolymerization to occur to lock the surfaces relative to one another. The photopolymerization can be of a cross-linking monomer positioned between the two surfaces, can be of an acrylic monomer grafted to the two surfaces, or can be of a photoresist formed at the two surfaces; a photoinitiator is required in the first two cases.

Abstract: Compositions which can be polymerised by radiation and are based on surface-active, conjugated diacetylene compounds of the formula H(CH.sub.2).sub.m --C.tbd.C--C.tbd.C--(CH.sub.2).sub.n --A in which m and n=0 or 1-30 and m+n is at least 10 and A is a polar group, and which contain mixtures of such diacetylene compounds or are mixed with surface-active substances, are particularly suitable for use as a high-resolution photographic recording material.