ordinary sheathed explosive

ordinary sheathed explosive

[′ȯrd·ən‚er·ē ′shēthd ik′splō·siv]
(materials)
A permitted explosive (one passing certain safety tests) whose safety has been further increased by a sheath of sodium bicarbonate; when the explosive is detonated, the sheath forms carbon dioxide, which tends to extinguish the flame around the detonator wave.