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maria143
History fascinates me. I love reading historical books and watching movies with a historic touch. I really admire the archaeologists who spend days and nights in preserving history. It’s such a challenging job to bring historical remains back to their original state. It at times pains me to see how magnificent structures get ruined over the centuries.

Once while browsing the net, I came across something called dry ice blasting and how it is used to clean historical structures. I have no idea whatsoever on this thing. I am a little curious to know about this.

Maria
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Gehn
QUOTE (maria143+Jan 24 2008, 05:58 AM)
History fascinates me. I love reading historical books and watching movies with a historic touch. I really admire the archaeologists who spend days and nights in preserving history. It’s such a challenging job to bring historical remains back to their original state. It at times pains me to see how magnificent structures get ruined over the centuries.

Once while browsing the net, I came across something called dry ice blasting and how it is used to clean historical structures. I have no idea whatsoever on this thing. I am a little curious to know about this.

Maria
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Hi there! smile.gif

Dry ice blasting is a little like sand blasting. Dry ice is carbon dioxide (CO2) in it's solid state. Pellets of this are shot out onto the surface to be cleaned. The thermal energy resulting from the rapid movement and collision with the surface causes the dry ice to undergo sublimation, which means that it changes from a solid directly to a gas. This means that the CO2 takes up more space than when it was a solid, and it explodes outward. These micro explosions blast away any contaminants or residue on the surface, cleaning it.

- Gehn biggrin.gif
N O M
I've never heard of that. What a brilliant idea. It would be much less messy than using either a sand blaster or a water blaster.
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