Means for identifying time as of the opening of a closure, such as a blister pack for medications, including means for activating the time identification process upon the opening of the closure, and means for displaying a code associated with time elapsing from the activation wherein said activation initiates, for example, exposure to at least one of air, oxygen, humidity and light, evaporation, sublimation, and electric contact and said code comprising a change of area of at least one of color and opacity.La présente invention concerne un moyen didentification de linstant douverture dune fermeture comprenant un moyen dactivation du processus didentification temporelle après ouverture de la fermeture, et un moyen daffichage dun code associé à la durée écoulée depuis lactivation.
