Carbon dioxide fire extinguisher has a good fire extinguishing effect on library books. It is important not to pollute and corrode books and files.

Fire extinguishing mechanism of carbon dioxide: 1 A large amount of carbon dioxide surrounds the fire source, which inhibits the continuous replenishment of oxygen and achieves the purpose of fire extinguishing. This is called suffocation and fire fighting; Carbon dioxide exists in fire extinguishers and is liquid. After being put out, it is quickly converted into gas, which can absorb a lot of heat from the fire source and force the temperature of the fire source to drop below the ignition point, thus playing a role in extinguishing the fire. This is called cooling fire extinguishing.

So it is reliable to put out the fire with carbon dioxide.