Party popper
Encyclopedia
A party popper or party poppers is/are an object commonly used at parties
Party
A party is a gathering of people who have been invited by a host for the purposes of socializing, conversation, or recreation. A party will typically feature food and beverages, and often music and dancing as well....

. It emits a loud popping noise by means of a small friction-actuated explosive charge that is emitted by pulling a string or by compressed air released when released. In some party poppers an explosive charge is not used. In party poppers with an explosive charge, there are less than 16 milligrams of explosive charge. The streamers are non flammable for safe use. The charge or compressed air blows out some confetti
Confetti
Confetti is a multitude of pieces of paper, mylar or metallic material which is usually thrown at parades and celebrations, especially weddings . Confetti is made in a variety of colors, and commercially available confetti is available in imaginative shapes...

 or streamers
Streamers
Streamers is a play by David Rabe. After premiering at the Long Wharf Theatre in New Haven, Connecticut in 1975, the production transferred to Broadway, opening on April 21, 1976 at Lincoln Center's Mitzi E. Newhouse Theatre, where it ran for 478 performances...

 and emits a popping sound. Although they are in some places sold with fireworks, they are not considered fireworks and are often legal where fireworks are banned and/or excluded from regulation of fireworks sales. They are also generally listed as a novelty item or trick noise maker and are sold year round in many party supply stores or with party supplies in many stores.

There are also party popper revolver
Revolver
A revolver is a repeating firearm that has a cylinder containing multiple chambers and at least one barrel for firing. The first revolver ever made was built by Elisha Collier in 1818. The percussion cap revolver was invented by Samuel Colt in 1836. This weapon became known as the Colt Paterson...

s on the market which utilise a speed loader style cartridge filled with six party popper charges inserted into a normally colourful plastic device loosely resembling the pistol variant. Its functionality is very much the same as the pistol, the depression of the trigger apparatus rotates the chamber so a live charge is presented to a hammer, which falls onto a regular cap ring embedded in the bottom of the insertable chamber. The chambers are one-use only, although reloading could potentially be done by hand.
For technical details of how the charge is constructed, see Takeo Shimizu's book, Fireworks: The Art, Science and Technique. (Austin: Pyrotechnica Publications, 1988).
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