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Ever since the creation of the spark plug, improvements have continually been made to achieve high ignitability and long life. To fulfill these requirements, “Iridium Spark Plug” was introduced in 1997 with fine-wire center electrode technology to promote ignitability and long life. Then in 2003 “Super Ignition Spark Plug” was developed which uses fine-wire precious metal alloys on both the center and ground electrodes to achieve supreme ignitability and long life. Currently, the global technology trend is focusing more and more on the regulation of emissions and fuel consumption. This is driven by increased awareness for environmental conservation. These regulations are becoming stricter, which leads to a higher demand for spark plug ignitability from all kinds of vehicles ranging from luxury cars through compact sized cars. Particularly in the small vehicle category, both ignitability and low cost are a requirement.