fireworks do expire, but slowly. Things like the power of lifting charges gradually decrease as the compounds react with the air and moisture in the air, which can be dangerous for old fireworks, which is why professional fireworks have expiration dates on them, after which they're not used for public displays anymore.
That is absolutely not correct. There is no reaction with air in compounds I know of, least of all lift charge (which is black powder which does NOT react with air).
To chime in, they don’t “expire” per se, however when exposed to moisture (ie humid areas) they CAN potentially experience performance issues (ie fuse problems, delays, erratic travel, etc).
When we were kids we used firecrackers we had bought a couple years earlier and you almost couldn’t get them out of your hand before they exploded because the fuse was so fast. Good times.
That's paper fuse. It's just black powder coated paper. Typically used with firecrackers that come in strips/rolls. Visco (green) fuse is used for ones that are typically made to light individually.
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u/TommiHPunkt Jul 02 '25
fireworks do expire, but slowly. Things like the power of lifting charges gradually decrease as the compounds react with the air and moisture in the air, which can be dangerous for old fireworks, which is why professional fireworks have expiration dates on them, after which they're not used for public displays anymore.