sarinox
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short question about colored smoke bombs
Hello all,
As u can see in the below link a person shows a method of making colored smoke bombs using oil pastel! I know for sure this is a hoax! but I wonder
does any of you know what actually works? Could any of you point me in the true direction of making colored smoke bombs? the reason I am asking you
instead of watching another YouTube video is I don't want to fall into another possible trap or dangerous process!
https://www.youtube.com/watch?v=_9Tkq3K1q_c&t=103s
-Sarinox
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Fery
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You need thermostable organic dyes which sublime without decomposition. The base pyro compound (white) should burn at quite low temperature. KClO3 + S
+ NH4Cl (IIRC 30 g : 20 g : 50 g) or maybe KNO3 + powdered sugar 50:50 grams (but I suggest the first one). You add there the coloring organic
substance. I've bought red, blue, green, yellow colors some time ago but I do not know their formulas. I was able to find the invoice and they were
quite cheap only 2 EUR per 100 grams of each of the 4 dyes. The label on package just stated red/blue/green/yellow smoke color without mentioning
exact chemical formula. It is cheaper to buy ready smoking compounds (airsoft shops) than mixing them at home from all the necessary components. But
preparing at home is more fun!
edit: I found some info here:
https://uranit.cz/view.php?page=dymovniceb
they claim Sudan-I for red, indigo for blue, alizarin-S + indigo for green, alizarin-S for yellow
also this video is amazing and they share the composition:
https://www.youtube.com/watch?v=EWaEhLhgeso
[Edited on 3-8-2024 by Fery]
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sarinox
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Thanks Fery :-)
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greenlight
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Fery is correct, you need a organic dye ( many are available on ebay if you search smoke dye like solvent green solvent yellow, etc.) Rhodamine B,
while getting on to every surface and turning it right purple, makes a beautiful pink/light purple colour.
The pyrotechnic composition you use must produce enough heat to vaporise the dye without burning and decomposing it as well as sufficient gas to
disperse it.
The low reaction temperature required narrows it down to one oxidiser, potassium chlorate. A usual fuel is lactose which is cheap and readily
available. The reaction equation is as follows:
8 KClO3 + C12H22O11•H2O 》》》》8KCl + 12 CO2 + 12 H20
Magnesium carbonate or sodium bicarbonate is also sometimes added as an acid neutraliser and coolant.
The dyes are strong absorbers of light. This light is reflected off the sublimed dye when it condenses in the air which is why the resulting smoke is
so vivid and bright in colour.
You can also mix different dyes in a way similar to mixing paints to achieve different shades of the same colour. For example, blue and yellow dyes
can be mixed in various proportions to result in different shades of green
Be good, otherwise be good at it 
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sarinox
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Tanx Greenlight :-)
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sarinox
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By the way is any of these substances (such as Rhodamine B) prone to release toxic byproducts when heated? or their vapors are they going to be toxic?
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greenlight
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The solvent dyes are the same ones used by the military and are pretty safe. I think the rhodamine b is a suspected carcinogen.
The safety is the same as when the dyes are in their original powdered form as you are not burning them to release by-products.
You are simply sublimating them with heat and then they are recondensing into solid dye particles in the air again.
Just don't go purposely inhaling them which you can't as the "smoke" is quite overwhelming if u breathe some in.
Be good, otherwise be good at it
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