Patent ID: 7759049

Claim:
A laser engravable printing element which is a photocured resin composition comprising: (a) 100 parts by weight of a resin which is in a solid state at 20° C., wherein said resin has a number average molecular weight of from 5,000 to 300,000, (b) 5 to 200 parts by weight, relative to 100 parts by weight of said resin (a), of an organic compound having a number average molecular weight of less than 5,000 and having at least one polymerizable unsaturated group per molecule, and (c) 1 to 100 parts by weight, relative to 100 parts by weight of said resin (a), of inorganic porous particles having an average pore diameter of from 1 nm to 1,000 nm, a pore volume of from 0.1 ml/g to 10 ml/g and a number average particle diameter of not more than 10 μm, said laser engravable printing element being obtained by shaping said resin composition into a sheet or cylinder, and irradiating the shaped resin composition with a light or an electron beam to thereby photocure said resin composition.