Abstract: A photographic flash lamp having an envelope defining a chamber, at least a portion of the envelope being transparent. A support mesh is positioned within the chamber and has a first portion out of contact with the remainder of the lamp. Suitable combustible material to produce the flash, is adhered to the first portion of the mesh to generate a flash upon ignition. An ignitor ignites the combustible material.

Abstract: A photoflash unit includes a housing with an internal chamber containing a charge material. The housing's base has an opening. A primer is placed over or proximate to this opening. An anvil is placed over the material and a burn-away sheet is placed over the anvil. The burn-away sheet is sealed to the base and holds the anvil in place. When the anvil is struck percussively through the burn-away sheet, the primer ignites combustible material through the opening in the back wall. The burn-away sheet burns away, allowing the photoflash unit to vent to the rear.