Scanning Electron Microscopy (SEM) was used to evaluate the skin thickness of polyvinyl chloride under various conditions. This investigation had two objectives: to determine if SEM is a practical tool for quantifying the skin thickness of a polymer and to determine if mold temperature and lubricant concentration affect skin thickness. Even though measurements of skin thickness are subjective, this investigation concluded that SEM is a practical method for quantifying skin thickness when multiple measurements are made along the cross section.