Carbon-freezing/Legends

Carbon freezing is used in the process of storing Tibanna gas in carbonite to preserve it while it is being transported over long distances. In the freezing process, the gas is pumped into a freezing chamber where it is mixed with molten carbonite into a solid block. The gas is released later at its destination or at the processing center. Darth Vader ordered the modification of a freezing chamber on Bespin's Cloud City so that he could freeze Luke Skywalker-and thus nullify his Force powers-to transport him to the Emperor. As a test, the process was tried on Han Solo, who survived the freezing process and was eventually freed from his trap.