Celluloid is used in weapon ignition systems primarily due to its flammability, ease of processing, and low cost. details are as follows:

Flammability: Celluloid is primarily composed of nitrocellulose, which burns easily in the presence of open flames and high temperatures. Its auto-ignition point is 180°C. Once ignited, it burns rapidly, generating flames and heat quickly, meeting the requirements of weapon ignition systems for rapid ignition of other propellants.

Good Processability: Celluloid is tough and has good processability. It softens when heated and hardens upon cooling. It can be easily formed into various shapes of ignition system components, such as ignition cartridges and ignition tubes, through stamping and other methods.

Low Cost: Celluloid’s production process is relatively simple, and the raw material cost is low, making it suitable for large-scale production and reducing the manufacturing cost of weapon ignition systems.

Good Combustion Characteristics: As a combustible shell material, celluloid leaves little or no residue after combustion, preventing fragments from damaging the propellant surface or clogging the nozzle, thus ensuring the proper operation of the ignition system and weapon system.