Before revision: Deterioration Plasticizers have migrated from a soft vinyl eraser to partially dissolve a plastic pen cap 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: Loss of plasticizers over 50 years caused embrittlement of electrical insulationDeterioration Plasticizers have migrated from a soft vinyl eraser to partially dissolve a plastic pen cap 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.