Clear View Transparent PVC Curtains Our range of clear view transparent PVC is manufactured using quality raw material and advanced technology, to ensure high performance and long working life. These have a specially designed top allows the sample to be poured accurately, with little or no splashing. PVC being very rigid, it stays straight and never bends or distorts under normal care. PVC naturally sinks in water, due to its specific gravity, relative to water and it does not require weights to restrict flow of sample entering and exiting bailer.