Diesel Dye is done to identify the fuel as non-taxed and to help enforcement officials easily identify it. This is commonly used around the world to illustrate the proper use of the fuel.
Petroleum dyes are colored aromatic compounds that are added to petroleum and gasoline to generate color. To enhance the accuracy of the estimates, the data has been validated by conducting interviews with industry experts.
Petroleum dyes are a natural or else synthetic colored substance used to add color to the gasoline, petroleum products and has an affinity to the substrate to which it is being applied. http://www.dyedepot.com/