Liquid nitrogen might be overkill in this case; the goal is to cool the plastic down below its brittle transition temperature, which for most plastics is about -40° (420° R). Dry ice will do the ...

“Liquid nitrogen, with its boiling point at -196 degrees Celsius, is exceptionally cold ... form of nitrogen that exists at its lowest temperature and is used to create a dramatic smoking ...

Liquid nitrogen and dry ice are harmful. Dry ice’s temperature can drop as low as -196 degrees Celsius and liquid nitrogen to -78.5 degrees Celsius. They get their names from the thick white ...