Before revision: Deterioration Plasticizers have migrated from a soft vinyl eraser to partially dissolve a plastic pen cap Loss of plasticizers over 50 years caused embrittlement of electrical lampcord Outdoors UV radiation effects on vulnerable PVC conduit Decayed cellulose nitrate film A difficult aspect of plastic deterioration is that one cannot see what types of chemical reactions are occurring in the interior of an object, or easily identify the makeup of proprietary plastic composites.
After revision: Deterioration Over several years, plasticizers inhave migrated a soft vinyl eraser to partially dissolve a plastic pen cap Loss of plasticizers over 50 years caused embrittlement of electrical lampcord Outdoors UV radiation effects on vulnerable PVC conduit Decayed cellulose nitrate film A difficult aspect of plastic deterioration is that one cannot see what types of chemical reactions are occurring in the interior of an object, or easily identify the makeup of proprietary plastic composites.