How does dry ice remove contaminants?

Spraying Method: Dry ice particles, when sprayed, rapidly cool the surface of contaminants, causing them to contract and become brittle. A compressive stress wave is generated between the coating and the substrate, and the energy between them is sufficient to overcome the bond strength, resulting in the separation of the coating from the inside out. For coatings with higher toughness or viscosity, such as oil, wax, or butter, the cleaning action of dry ice blasting is similar to the scouring action of highpressure water, removing the grease.

Physical Action of Dry Ice: The physical action of dry ice causes contaminants to detach from the surface without damaging the underlying material.