1.1 This test method covers the determination of the thermal insulation quality of a package and its enclosed packaging from temperature differentials between the packaged item and the outside environment. It is suitable for testing packages with and without various internal refrigerants and with or without interior packaging. Representative test conditions covered are indicated by Figs. 1 and 2. Depending upon the type of insulation material used, a water-vaporproof barrier might be used just inside the exterior packages of Fig. 1.

1.2 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in 5.2.3 and 9.2.2.