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  2. Stain-blocking primer - Wikipedia

    en.wikipedia.org/wiki/Stain-blocking_primer

    [2] [3] The ACI is calculated based on the amount of solvent in the primer, the volume of the room to be primed, the volatility of the solvent and the amount of primer to be applied. The calculations were made based on a 3,500 square feet (330 m 2) room and primer with coverage of 375 ft2/gallon.

  3. Pyrotechnic initiator - Wikipedia

    en.wikipedia.org/wiki/Pyrotechnic_initiator

    This mixture is used in the NASA Standard Initiator, [2] which is used to ignite various pyrotechnic systems, including the NASA standard detonator. [3] It yields rapid pressure rise, generates little gas, emits hot particles when ignited, is thermally stable, has long shelf life, and is stable under vacuum. It is sensitive to static electricity.

  4. Tubes and primers for ammunition - Wikipedia

    en.wikipedia.org/wiki/Tubes_and_primers_for...

    Primer actuated blowback operation Rimmed, Mk. VII centerfire .303 cartridge from WW II. Manufactured by Colonial Ammunition Company, New Zealand. The first cartridges for cannon were made up of gunpowder packed in a paper bag or case. For many years after the introduction of cannon the powder was introduced into the bore by means of a scoop ...

  5. Primer (paint) - Wikipedia

    en.wikipedia.org/wiki/Primer_(paint)

    Primer reduces the number of paint coats needed for good coverage and even color. A thin layer of paint may still be permeable to water. Water can permeate into the wood and cause warping, mildew, or dry rot. Primer improves the waterproofing of the finish. [4] Primers are not used as part of a wood stain treatment because they obscure the wood ...

  6. Blowback (firearms) - Wikipedia

    en.wikipedia.org/wiki/Blowback_(firearms)

    For Mausers StG 45(M) project Maier assumed a 120 g (4.2 oz) bolt head and 360 g (12.7 oz) bolt carrier (1 to 3 ratio). The prototype StG 45 (M) assault rifle had 18 longitudinal gas relief flutes cut in the chamber wall to assist the bloated cartridge casing from the chamber walls during extraction. Fluting the end of the chamber provides ...

  7. Primer (firearms) - Wikipedia

    en.wikipedia.org/wiki/Primer_(firearms)

    The firearm firing pin crushes this explosive between the cup and an anvil to produce hot gas and a shower of incandescent particles to ignite the powder charge. [2] Berdan and Boxer primers are used in centerfire cartridges; the primers differ in construction.

  8. List of the United States Army munitions by supply catalog ...

    en.wikipedia.org/wiki/List_of_the_United_States...

    The primers for the cartridges were non-corrosive because the M1 carbine's gas-system would have fouled or corroded if standard corrosive primers were used. It only came in Grade R ("Rifle") because the M1 Carbine was semi-automatic only, dispensing with the use for Grade 2 for an automatic weapon.

  9. Gunshot residue - Wikipedia

    en.wikipedia.org/wiki/Gunshot_residue

    Organic GSR (OGSR) consists of organic compounds such as nitroglycerine. [2] Organic compounds can originate from the primer, propellants, lubricants or other additives used by manufacturers. [3] Analysis of OGSR is not done with the same instrumentation as stated above, instead techniques like Gas Chromatography-Mass Spectrometry are used. [3]