The main thing you want to prevent is large scale ice crystal formation. Dry ice sits just below the temperature needed for water to crystalize when freezing, so it delays the crystal formation by a substantial amount. However, for extended periods the ice can still crystalize so that’s why it’s important to get to cryogenic temperatures.
The main thing you want to prevent is large scale ice crystal formation. Dry ice sits just below the temperature needed for water to crystalize when freezing, so it delays the crystal formation by a substantial amount. However, for extended periods the ice can still crystalize so that’s why it’s important to get to cryogenic temperatures.