Smoke bomb

Soft cased hand-held bombs were later designed to release smoke, poison gas, and shrapnel made from iron and pottery.

[citation needed] He developed 17th-century Chinese-style fireworks and later modified the formula to produce more smoke for a longer period.

Colored smoke devices use a formula that consists of an oxidizer (typically potassium nitrate, KNO3)[citation needed], a fuel (generally sugar), a moderator (such as sodium bicarbonate) to keep the reaction from getting too hot, and a powdered organic dye.

The burning of this mixture boils the dye and forces it out of the device, where it condenses in the atmosphere to form a smoke of finely dispersed particles.

They are typically made from materials that burn poorly and contained in vessels with a limited air intake that inhibit combustion.