DRY ICE CLEANING
Dry ice cleaning / dry ice blasting is the best solution when dirt must be removed without damaging the underlying surface, and when water cannot be used. The method of dry ice cleaning was developed in the USA, and it is a well recognized technique with many different applications throughout several industries.
In Finland, dry ice cleaning has been used for over 15 years with excellent results. This method is at its best when cleaning is otherwise very difficult or entirely impossible. The method is also completely dry and does not use any harmful chemical compounds.
Dry ice blasting works by blowing carbon dioxide granules onto a surface using pressurized air. When a granule hits the surface, it transfers an amount of heat necessary for sublimation. This cools the immediate surface area down to -70 °C (-57 °F) so quickly that the stress breaks molecular bonds, which then causes the dirt to separate from the surface. When it sublimates, the volume of carbon dioxide also expands 800-fold from its original which further loosens any foreign particles still stuck to the surface.