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Low Explosives and Pyrotechnic devices From commercial firework prices to how to make your own! If it doesn't fit in the other sections on explosives it will fit here...

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Old 23-09-2008, 09:59 AM
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Default Coloured smoke bombs

Does anyone have any experience with these? I was always under the impression that KNO3/Su cant be used because it burns too hot, but the more I look online that more sources I find that say it can be used. Are just right or just a load of crap? If they can't be used, what would a good formula be? I heard KClO3/sugar/sulphur/NaHCO3 with 5% by weight of a low boling point analine dye added. Does this sound right to anyone?
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Old 23-09-2008, 10:34 PM
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Default Re: Coloured smoke bombs

Aparently and this is total hearsay Food Colouring or Dye cannot be used in KNO3/Sugar Smoke 'Bombs' and that the videos purporting to show a Coloured Smoke Bomb like this one are forged.
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Old 23-09-2008, 11:11 PM
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Default Re: Coloured smoke bombs

Various alkali metal salts burn with different colors, and produce different colors of smoke...
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Old 24-09-2008, 04:32 AM
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Default Re: Coloured smoke bombs

certain organic dyes work fine with KNO3/Sugar, however there is always the chance that the dye is burned/decomposed from the heat, which is why potassium chlorate is used. Go to a craft shop and get some dry powder dies, of different colors, try each with the KNO3/Sugar and the ones that don't turn out right should be tried with potassium chlorate.
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Old 30-09-2008, 09:52 AM
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Default Re: Coloured smoke bombs

Quote:
Originally Posted by Bohrium View Post
Various alkali metal salts burn with different colors, and produce different colors of smoke...
Are you sure that's not just the flame?
Mm Most proper art supply shops will sell 500gms/kilo's of organic dye. Not too pricey for the use you'll get out of a bag.
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Old 30-09-2008, 09:53 AM
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Default Re: Coloured smoke bombs

But pricey enough that if the dye doesn't work you have wasted a lot of money.
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