Integrated time-temperature or radiation-dosage history recording device

A device comprising a substrate having deposited thereon at least two indicating units, each unit comprised of an acetylenic compound, or simple mixture thereof, each acetylenic compound containing at least one --C.tbd.C--C.tbd.C group, capable of reacting by 1,4-addition polymerization, thereby forming an end-point color after an irreversible, progressive color change upon thermal annealing or exposure to radiation selected from visible, ultraviolet, gamma ray, x-ray, alpha ray, beta ray, electron beam and laser beam radiation, said end-point color representing an integrated time-temperature history of thermal annealing or radiation-dosage history of exposure to said radiation, wherein one indicating unit is unreacted and representing zero time of exposure and the other said indicating unit being pre-reacted at 20.degree.-300.degree. C. by thermal annealing or exposure to said radiation to known extent and color, whereby the time required by such pre-reacted unit to form the end-point color by thermal annealing at a given temperature or for a known thermal history or exposure to said radiation at a given average radiation dosage rate is pre-determined and known.