FIELD: packing. SUBSTANCE: invention relates to method of making of bag designed for special processing at preservation and made at least of one film 10 consisting of two plastic layers, upper layer 11 and lower layer 12, forming outer and inner surfaces of said bag, and central layer 13 made of light metal and placed between upper and lower layers. According to invention, prior to making the bag, laser beam is aimed only lower layer of said film forming inner surface of said bag get at least one perforation 14 through thickness of said lower layer being preliminarily made line of cut. EFFECT: provision of accurate and directed tearing of bag at its opening. 27 cl, 20 dwg
