Excerpts from the report Introduction: Transparent plastic film packages are widely used for shelled nuts. They are less costly and lighter in weight than metal cans, but do not provide as much protection as metal from the effects of air, light, moisture, and insects. Since some kinds of shelled nuts are quite perishable, their shelf life in transparent film packages is usually rather limited unless suitable protective measures are taken. A better knowledge of the factors which contribute to the loss of quality and of the effectiveness of measures which may be taken to minimize these losses should be helpful to those concerned with marketing nuts. This report gives results of a study of several kinds of nuts that were packaged in film bags and stored under controlled conditions, and a study of film-packed shelled walnuts that were bought in retail stores.