Dry ice is made by taking pressurized Liquid CO2 (LCO2) and allowing it to expand into the natural atmosphere. This causes the LCO2 to expand into both a gas vapor and solid snow. The snow is then either compressed to form blocks or compressed and extruded to form pellets or nuggets.
Dry ice blasting works by using reclaimed carbon dioxide to freeze and blast away contaminants. It's most effective for soft, thick layers of contaminants such as aircraft sealants. Other advantages are that dry ice blasting doesn't require secondary waste cleanup and is considered environmentally friendly.
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