We condense from an English exchange a description, of the white, or rather ... it could have happened to a manufactory of common black gunpowder. We now come to the process of manufacture.

To make these loud explosions, which are usually accompanied by a bright white flash, firework manufacturers use mixtures of perchlorate, a different kind of explosive than black powder.

To begin the artistic process, Cai sprinkles black gunpowder over enormous panels laid out on the floor. As he dances over the panel in slippers, Cai drops bits of cardboard and makes playful ...