Used in 12th century China to frighten off evil spirits,
fireworks are met with almost universal delight today
- particularly since Grucci family perfected the art of creating intricate
of shapes in 1992 to celebrate the quiencentennial of
Columbus's voyageto America.
Here's how it done:
Individual fireworks are housed inside large
cardboard shells that looklike giant bullet casings.
Inside each shell is a fuse and tightly packed gunpowder.
Molded within the powder are the light bursts used
to create an individual shape: pellets composed of gunpowder,
chemical pigment and a binding agent.
The key to turning random light burst into those astonishing forms
has to do with how a shell is pack.
Light burst packed in the shaped of a heart make a heart-shaped fireworks, star shapes,
ovals, so on.
sounds simple, right?
W.r.o.n.g.
-never try these at home.-
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