The development of smoke bombs is discussed from the following three aspects: the structure of the smoke bomb, wide band smoke agent, and safety and environmental friendliness. Multi-level charge and skillful design of the bomb are discussed in detail, including smoke cartridges forming a smoke screen in the air, devices for preventing assembly errors, smoke torches with deceleration devices, and floatable smoke pot. The constituents of smoke agents and improvement for safety and environmental protection were introduced, such as a stabilizer consisting of aliphatic or aromatic dicarboxylic acids for reducing gaseous ammonia which weakens the structure of a smoke body when a light-metal powder is used as the metallic reduction agent in the smoke kit. Besides safety and environmental protection, skillful design of bomb structures and development of wide band adaptation techniques will be future research directions.
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