Question

What determines the color of a spark

Answer 1

Spark testing is a method of determining the general classification of ferrous materials. Spark color determines ignition coil performance. A spark-ignition engine is an internal combustion engine, generally a petrol engine, where the combustion process of the air-fuel mixture is ignited by y a spark from a spark plug.A bright blue spark is best. A yellow/orange spark signifies weak ignition. The hottest spark is ultraviolet which we can't see. Blue spark is cold in comparison to ultra-violet. Orange and yellow come from particles of sodium in the air ionizing in the high energy of the spark gap.