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About: Dragon's egg     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatFireworks, within Data Space : dbpedia.org associated with source document(s)

Type: yago:Abstraction100002137yago:Chemical114806838yago:Explosive103304730yago:Firework103348454yago:LowExplosive114853392yago:Material114580897yago:Matter100020827yago:Part113809207yago:PhysicalEntity100001930yago:Relation100031921yago:Substance100019613yago:WikicatFireworks New Facet based on Instances of this Class

A dragon's egg is a fireworks pyrotechnic star which first burns for a period for a visual effect and then loudly deflagrates. This effect became controversial because of the toxic compounds once used, particularly lead tetroxide (Pb3O4). Nowadays, however, bismuth trioxide or bismuth subcarbonate are commonly used as more environmentally friendly substitutes for lead compounds to achieve the effect, and its occurrence in fireworks displays has since become much more common.