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What is dry ice blasting?

Dry Ice Blasting is an innovative, non-toxic, non-abrasive cleaning method that produces zero secondary waste.  Dry ice pellets replace traditional blasting materials such as steam, waste and chemicals, and vaporize immediately on contact with the surface being cleaned.  Only the soil that has been dislodged remains to be disposed of.

Secondary waste includes sand, glass, dirty water, dirty cloths, chemical containers and any other waste product left over after alternative cleaning methods.  

What is dry ice?

Dry ice is the solid form of recycled carbon dioxide (CO2) which is a natural part of the atmosphere.  At atmospheric pressure, dry ice is -78°C.  It is odour-free, non-toxic and incombustible,  

When dry ice melts, it goes through a sublimation process. Sublimation is the transformation directly from solid to gas, without first becoming liquid.  Therefore, dry ice does not produces liquid where standard ice produces water.  When dry ice melts, it merely turns into a gas and disappears.  Hence the name – dry ice.  

 

Before & After Dry Ice Blasting

 

How does it work? 

Small rice-sized pellets of CO2 are blasted with compressed air at the dirty surface. The extremely low temperature of the dry ice (-78°C) kills any bacteria and freezes the soil, which becomes brittle and flakes off.  The pellets sublimate on impact, leaving only the dislodged soil to sweep up off the floor!  Being non-abrasive, dry ice leaves the original surface in perfect condition.  

 

 

View ColdJet Dry Ice Blasting video library

 

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FREQUENTLY ASKED QUESTIONS: 

Does dry ice blasting actually sanitise the surface being cleaned?

Yes.  Being -78°C, dry ice blasting has a sanitising effect on the surface being cleaned.  Allergen contamination is eliminated, surfaces are sterilised and mould and bacteria growth is inhibited.  

 

Is dry ice blasting safe for the environment?  

Dry ice blasting is recognized as an environmentally responsible cleaning process because it doesn’t produce any hazardous secondary waste.  Dry ice is recycled CO2 that would normally have already been released into the atmosphere. This cleaning methodology gives CO2 a “second life” before finally being released. Dry ice blasting has no ozone depleting potential.

 

Why use dry ice instead of traditional blast materials?

Most other blast media leave secondary waste behind.  Dry ice sublimates upon impact with the surface.  All that remains is the dislodged contaminant being removed.  Furthermore, since dry ice vaporises on impact, the process can be used to clean complicated cavities where typical grit blast media will become trapped.  Dry ice is also non-conductive, therefore perfect for cleaning electrical components.  

 

Will dry ice damage the substrate?

The dry ice blasting process will not damage the substrate.  The size of the dry ice pellets and their velocity can be optimized to remove the contaminant while remaining non-abrasive to the substrate.  The process can clean delicate chrome or nickel plated tools, soft aluminum or brass alloys, wire insulation and even circuit boards – all without damage. 

It is important to note that in the hands of an untrained operator, these results can not be depended on.  Please engage the help of an expert for best results.  

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