4.2.5 Type CP,a test piece desribed in Fig.3,which is a modified trouser tear test piece with a constrained path for the tear. Type CP also measures tear propagation in a direction parallel to the length of both legs, but the constrained path prevents the tear from propagating away from this path,and the thicker legs eliminate the influence of leg extension which may occur with Type T test pieces.See(1)for more information on CP tear testing.