4.2.3 Type C, an un-nicked test piece with a 90 angle on one side and with tab ends, as shown in Fig.1,Die C .the force acts on the test piece in a direction substantially parallel to the tab ends of the specimen(45 to the 90 center angle) in the direction of grip separation. Type C measures rupture, or tear initiation dose not occur at the apex,the results are more indicative of tensile strength than tear strength.