Information on the most widely used ASTM standards within the materials testing industry
ISO 182-1, IEC 60811-3-2, IS: 4669, PVC compounds thermal stability test Congo red method electric and optical cable. The determination is carried out on a sample of the PVC compound which is maintained at an agreed temperature in still air until the colour of a Congo red paper held above it changes from red to blue. If universal indicator paper is used, the colour change is that corresponding to pH 3.
ISO 182-1 PVC compounds thermal stability test Congo red method
IS: 4669 thermal stability test Congo red method Methods of test for polyvinyl chloride resins

This test method is intended to determine the thermal stability of a PVC compound when processed at a high temperature. The method is applicable to all PVC compounds, copolymers and products based on them. A test specimen of the PVC material is heated at a defined temperature, normally 180°C.
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