1. A method for producing a record of retrievable information comprising: providing a layer including an imaging organo-tellurium material and a separate spectral sensitizer, said imaging material and said sensitizer being carried in a polymeric matrix material comprising said layer, said imaging material being in the form of a tellurium tetrahalide adduct of an aromatic amine in which nitrogen attached directly or indirectly to the aromatic radical is substituted by alkyls each containing from 1 to 4 carbon atoms and being free from diazo groups, said imaging organo-tellurium material being of one structure and having one detectable characteristic which is capable of undergoing a change in response to the application of imaging energy to produce a material of different structure having another detectable characteristic, the step of applying imaging energy in the form of particle or wave radiation to certain portions of said layer to bring about in said certain portions of said layer the formation of a latent image, at which said imaging organo-tellurium material can be changed to said different structure having said other detectable characteristic.