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  2. Hectograph - Wikipedia

    en.wikipedia.org/wiki/Hectograph

    Unlike a spirit duplicator master, a hectograph master is not a mirror image. Thus, when using a spirit duplicator master with a hectograph, one writes on the back of the purple sheet, using it like carbon paper to produce an image on the white sheet, rather than writing on the front of the white sheet to produce a mirror image on its back.

  3. Primer (paint) - Wikipedia

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

    A water-based primer, used primarily on wood. A primer (/ ˈ p r aɪ m ər /) or undercoat is a preparatory coating put on materials before painting.Priming ensures better adhesion of paint to the surface, increases paint durability, and provides additional protection for the material being painted.

  4. Tubes and primers for ammunition - Wikipedia

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

    With quick firing guns (those using metallic cartridge cases) the case itself is fitted with the igniting medium; in England these are called primers. For small guns the case contains a percussion primer, usually a copper cap filled with a chlorate mixture and resting against an anvil. [2] The striker of the gun strikes the cap and fires the ...

  5. Stain-blocking primer - Wikipedia

    en.wikipedia.org/wiki/Stain-blocking_primer

    The below calculated ACIs were done on solvent-based primer containing 350 g/L of solvents and the water-based primer containing 50 g/L of butyl glycol. The values on this chart indicate that the use of mineral spirits based primers would need 6 to 7 air changes per hour requiring significant ventilation. The use of low-odor, isoparaffinic ...

  6. Flash (photography) - Wikipedia

    en.wikipedia.org/wiki/Flash_(photography)

    Each bulb in a Magicube was set off by releasing one of four cocked wire springs within the cube. The spring struck a primer tube at the base of the bulb, which contained a fulminate, which in turn ignited shredded zirconium foil in the flash. A Magicube could also be fired using a key or paper clip to trip the spring manually.

  7. Electronic firing - Wikipedia

    en.wikipedia.org/wiki/Electronic_firing

    Electronic firing refers to the use of an electric current to fire a cartridge instead of a centerfire primer or rimfire primer. [1]In modern firearm designs, a firing pin and primer are used to ignite the propellant in the cartridge which propels the bullet forward.

  8. Maynard tape primer - Wikipedia

    en.wikipedia.org/wiki/Maynard_tape_primer

    Diagram of a Springfield Model 1855 Musket's lock mechanism. The small plate with the eagle on it is the cover for the Maynard tape system. Maynard's new system still required the musket's powder and Minié ball to be loaded conventionally into the barrel, but the tape system meant that the percussion cap no longer needed to be manually loaded onto the percussion lock's nipple.

  9. MicroLED - Wikipedia

    en.wikipedia.org/wiki/MicroLED

    Mass transfer is used to pick and place several thousand LEDs from one wafer to another at the same time, and the LEDs are bonded to the silicon substrate using reflow ovens. The flip-chip method is used for micro displays used on virtual reality headsets. Another microLED manufacturing method involves bonding the LEDs to an IC layer on a ...

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