tetraheterofulvalene derivatives contemplated for use in this invention have the following molecular formula str2 where x is selected from s and or se r can be an alkyl group having from about 1 to 8 c atoms or a benzyl group the benzyl group can be a part of a polymer chain y can be selected from an ether or ester group specific compositions which can be successfully used in the present invention include the halocarbons chosen for the purposes of this invention include those which have a high electron affinity for photo reactions with the above tetraheterofulvalene derivatives typically they are selected from ccl 4 cbr 4 c 2 cl 6 c 2 cl 2 br 4 c 3 br 4 h 4 c 2 br 2 cl 4 c 2 h 2 cl 4 c 2 br 6 c 3 cl 8 chbr 3 and the like the halocarbon is present in the composition in amounts ranging from 0 05 0 5 times the concentration of the tetraheterofulvalene the sensitivity and the resolution of image development depends a great deal on the purity of the components of the composition as well as the mole ratio of the halocarbon to the tetraheterofulvalene typically this mole ratio is maintained in a range of from about 0 1 to about 0 2 solvents which can be used include toluene chloroform methylene chloride tetrahydrofuran methylethylketone and the like the specific solvent used depends on.