section_path: Types/Low explosive
section_name: Low explosive
paragraph_text: Low explosive
  
  The simplest and oldest 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 mixture of an oxidizing salt, such as potassium nitrate (saltpeter), with solid fuel, such as charcoal or aluminium powder. These compositions deflagrate upon ignition, producing hot gas. Under normal circumstances, this deflagration occurs too slowly to produce a significant pressure wave; low explosives, therefore, must generally be used in large quantities or confined in a container with a high burst pressure to be useful as a bomb.