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The Charpy method and the Izod method are usually applied to test of impact strength of rigid PVC plate. There are some differences between various standards on shapes and dimension of the Charpy impact test specimens. Ten kinds of rigid PVC plates have been tested according to the JIS, the ISO and the ASTM Charpy impact testing methods, and also to the ASTM Izod impact testing method. The results obtained are summarized as follows:

Correlation between Impact Strengths Measured on the Basis of Various Standards for Rigid PVC Plates