When dry ice is sprayed on the stage, the sublimation of dry ice will absorb heat and reduce the air temperature. When it is cold, the water vapor in the air will liquefy into small water droplets and suspend in the air to form white fog. Dry ice is often sprayed on the stage to create a white fog to render the atmosphere.

Dry ice is a solid form of carbon dioxide, usually a colorless and odorless gas, which naturally exists in the air. Dry ice is easily volatilized and sublimated into gaseous carbon dioxide, which is 1000 times larger than the solid area. Therefore, dry ice cannot be stored in a container with good sealing performance and small volume, otherwise it is easy to explode.