This handbook provides information for persons who are preparing to take a test for certification in the plastics industry. The nine sections of the handbook provide information on the following: (1) the mission of the Society of the Plastics Industry and the value of the National Certification in Plastics; (2) tips on preparing for the exam; (3) tips on taking the exam; (4) information about what happens after a candidate takes the exam; (5) the body of knowledge a candidate needs to know (basic process control; preventive and corrective action on primary and secondary equipment; handling, storage, packaging , and delivery of plastics materials; quality assurance; safety; tools and equipment; and general knowledge); (6) sample questions; (7) a reference list composed of 24 primary reference materials and 17 secondary reference materials; (8) a list of Sylvan Technology Testing Centers where the certification tests can be taken; and (9) tips on completing the application. An application to take the certification test and a step-by-step process for getting certified are included in the handbook. (KC)