Air samples which have been collected on a Nuclepore™ filter for TEM asbestos and other particulate analysis may lose fibers or other particulate during normal transport and handling conditions. Various reports and observations confirm that the distribution of collected particulates may be altered due to static electricity charge effects, physical dislocation, and even some subsequent analytical proceduresA method to help assure particulate sample integrity during transport is presented here. It involves enveloping the freshly taken sample between two electron transparent films. The first film is evaporated onto a Nuclepore™ filter of the chosen diameter and pore size. Vacuum deposit about 40 nm of carbon onto the collection side of the filter without polymerizing the polycarbonate by overheating. Load this filter in the sampling cassette under clean room conditions and store for transport to the field. Next, cast an electron transparent film of collodion in amyl acetate on a clean water surface. Select a portion of the cured film that is even, colorless, and flawless to pick up on the base end of the middle piece of a second cassette.