(10 min.) Purple K Fire Extinguishers program will focus on the classes of fire extinguishers and proper use. Powdered bicarbonate of soda had been used as a flame-halting agent for many years. Investigators conducted fire tests with many powdered substances. American industry was called in, and the new highly effective product, called Purple-K-Powder became used throughout the Navy and in U.S. municipal and industrial fire protection operations, and thereafter throughout the world. It is the only dry chemical agent recognized by the National Fire Protection Association for airport crash rescue firefighting. Potassium Bicarbonate fire extinguishers, commonly referred to as PURPLE K, are highly effective on B and C class fires. Common applications are military facilities, oil refineries, airport ramps, service stations, and transfer areas. Program comes with a CD-ROM of written materials, including test questions and answers. English title also includes PowerPoint presentation.