1. A photosensitive product for the formation of microlithographic resists, masks and the like comprising a substrate, a layer of an etchable chalcogenide glass on said substrate, and an extremely thin deposit of silver on the surface of said chalcogenide glass, said silver deposit being thinner than about 100 A., said silver deposit being formed by depositing binderless silver halide thereon and photographically reducing and fixing said silver halide in the absence of exposure to activating radiation.