In physics, cryogenics is the study of the production and behavior of materials at very low temperatures. It is not well-defined at what point on the temperature scale refrigeration ends and cryogenics begins, but scientists assume a gas to be cryogenic if it can be liquefied at or below −150 °C (123.15 K; −238.00 °F).
The U.S. National Institute of Standards and Technology has chosen to consider the field of cryogenics as involving temperatures below −180 °C (93.15 K; −292.00 °F). This is a logical dividing line; since the normal boiling points of the so-called permanent gases (such as helium, hydrogen, neon, nitrogen, oxygen, and normal air) lie below −180 °C while the Freon refrigerants, hydrogen sulfide, and other common refrigerants have boiling points above −180 °C.
This infographic by futurism will help you understand more about the procedure –
So what are your thoughts on cryogenics? Will you ever give it a try?