It's fairly easy to make colored flames by adding these chemicals to your smoke bomb recipe:
Chemicals Used to Color Flames
- Red - strontium salts, most easily found in road flares
- Orange - calcium chloride (laundry bleaching agent)
- Yellow - sodium nitrate (common in chemistry lab)
- Green - barium salts, such as barium nitrate (common in chemistry lab)
- Greenish-Blue - copper sulfate (common in a chemistry lab, also found in many algicides for pool treatment) Blue - copper chloride (common in chemistry lab)
- Purple - potassium permanganate (common in a chemistry lab, also used in sewage or water treatment)
- White - magnesium sulfate (epsom salts, found on laundry aisle or in a pharmacy)
Essentially, you are adding metal salts to get colored flames. You may get additional ideas from looking at the Flame Tests, Fireworks Colors, and How to Color Fire tables. The metal salts listed here produce a relatively safe smoke. Use caution when considering other metals salts, as some compounds may produce toxic smoke.
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