Het hoofdbestanddeel in vuurwerk is buskruit: een mengsel van kaliumnitraat (KNO3), koolstof (C) en zwavel (S). Het buskruit wordt vermengd met diverse hulpstoffen voor de bijzondere effecten en kleuren.
Door toevoeging van bepaalde chemicaliƫn (metalen) krijgt vuurwerk zijn speciale kleuren. De meest voorkomende (basis)kleuren zijn de volgende:
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