Information recording system comprising reversible color image

Claim 2

AN INFORMATION RECORDING PROCESS FOR REVERSIBLY PRODUCING A COLOR IMAGE WHICH COMPRISES EXPOSING A SOLID RECORDING MEMBER TO ACTIVATING PHOTORADIATION IN THE IMAGE PATTERN TO BE RECORDED FOR A SUFFICIENT TIME PERIOD TO PRODUCE A COLOR IMAGE, THE RECORDING MEMBER COMPRISING AN OPTICALLY TRANSPARENT PHOTORADIATION INERT AND NONHALOGEN RECEPTIVE SUSPENDING SOLID POLYSTYRENE CONTAINING IN SOLUTION FROM ABOUT 5 PERCENT BY WEIGHT UP TO THE LIMIT OF SOLUBILITY OF A POLYHALOGENATED ORGANIC COMPOUND WHICH FORMS A REVERSIBLE CHROMOPHORE IN THE SUSPENDING SOLID POLYSTYRENE RESPONSIVE TO THE PHOTORADIATION, THE POLYHALOGENATED ORGANIC COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF IODOFORM, METHYLENE IODIDE, TETRAIODOETHYLENE AND CHLORANIL, SAID POLYHALOGENATED COMPOUND BEING THE SOLE LIGHT-SENSITIVE COLOR IMPARTING MATERIAL IN THE RECORDING MEMBER, FURTHER EXPOSING THE RECORDING MEMBER TO A UNIFORM PATTERN OF THE ACTIVATING PHOTORADIATION, AND HEATING THE EXPOSED RECORDING MEMBER TO A TEMPERATURE BELOW THAT AT WHICH SAID COMPOUND UNDERGOES SIGNIFICANT SUBLIMATION FOR A TIME SUFFICIENT TO ERASE SAID COLOR IMAGE AND RESTORE SAID RECORDING MEMBER TO A CONDITION SUBSTANTIALLY IDENTICAL TO ITS CONDITION PRIOR TO SAID EXPOSURE.