Investigation of the Stability of Electric Detonators After Storage. This work has been carried out to investigate the stability of electric detonators after storage. The delay time of the investigated detonators has been increased due to the storage effect. This can cause unintentional flyrocks due to overlapping. Maximum storage time has been calculated out of the measured delay times from five years storage. Furthermore, a recommended method for testing the stability of the electric detonators has been suggested.