1.1 This test method covers the determination of puncture properties of plastic films, over a range of test velocities. 1.1.1 Test Method D 1004 has defined film as having a thickness not greater than 0.25 mm (0.010 in.). Plastic materials having a thickness above this limit are not to be excluded from use unless shown to be rigid (see 3.2.1). Test Method D 3763 is the recommended method for instrumented puncture testi