In many countries, sulfuric anhydride is usually used for smoking on the plane. In middle school chemistry, we know that sulfur trioxide generates atomized sulfuric acid when it meets water; High concentration hydrochloric acid will volatilize and produce white smoke. In the high-pressure vessel of an airplane, sulfuric anhydride is liquid. When the pilot opens the valve, sulfuric anhydride is ejected from the high-pressure container, which combines with water vapor in the air to form smoke. If different ingredients are added, cigarettes can show bright colors. Although the smoke formed in this way is beautiful, it has corrosive effect on the aircraft surface, so when setting the nozzle, it must be ensured that the smoke will not be sprayed on the aircraft fuselage. There is another simple method: injecting diesel into the tail nozzle of a jet engine can also produce thick white smoke.

The smoke spraying device installed at the tail of the aircraft is equipped with a color smoke generator, which is in the original position after spraying. When the plane flies forward, the ribbon is formed relative to the plane.