Weathering: The Testing Manual provides guidelines and procedures for conducting weathering tests on various materials and products to simulate the effects of exposure. The methods of weathering discussed are based on requirements of ASTM, ISO, BS, Ford, GM, IEC, IEEE, MIL, PV, SAE, UL, and VDA standards. The book details the methods used, their differences, parameter settings, and hardware that is commercially available for performing the tests. Also included is information on sample preparation, evaluation methods, frequency of data collection, data analysis and interpretation, and reporting. This book is an excellent companion piece to the Handbook of Weathering, Seventh Edition, as well as The Encyclopedia of Polymer Degradation, with the former serving as a monographic source of knowledge on various aspects of weathering, and the latter outlining the limitations and challenges of presently conducted weathering studies to formulate needs and directions for transition from present comparative evaluation to knowledge-based utilization of existing resources. These three books together are powerful tools for chemists, chemical engineers, materials scientists, environmental chemists, legislators, teachers, and students.