Page "Bomb" Paragraph 20

The simplest and oldest type of bombs store energy in the form of a low explosive.

Black powder is an example of a low explosive.

Low explosives typically consist of a composition of an oxidizing salt, such as potassium nitrate, and solid fuel, such as charcoal or aluminum powder.

These compositions deflagrate upon ignition producing hot gas.

Under normal circumstances deflagration occurs too slowly to produce a significant pressure wave.

Low explosives must, therefore, be used in large quantities or confined in a container with a high burst pressure to be used as an effective bomb.