Carbon-freezing chambers were tibanna gas freezing technology used in Cloud City on Bespin to freeze carbon. "Vacuums" located on Bespin took in tibanna gas from the depths of the planet and released it into the chambers to be frozen for more convenient transportation. While the gas is suspended inside the chamber, liquid carbonite was applied, which cooled around the gas, freezing it.
The controls of a carbon-freezing chamber
Freezing chambers were also sometimes used to seal living beings—though one miscalculation could lead to death. This process required molten carbonite to be released into the chamber which was then flash frozen; a resulting blast of air, soon revealing a solidified encasement.[1] The process could induce hibernation sickness after being released, as was the case with Han Solo.[2] The Alderaanian Medical Association also established that inhaling carbon-freezing smoke was a health risk.[3]