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Visual Effects:
How to Make Your Own Smoke Bombs

by Bob Lazar & United Nuclear

By far, the most common smoke formula is the Potassium Nitrate/Sugar formula.
It produces a white-gray smoke and is both easy, inexpensive & fun to make.
The percentage of Potassium Nitrate and Sugar in this composition vary somewhat depending on who you ask, but the 60/40 mix listed below is pretty common.

A lump of this stuff the size of your thumb produced the smoke cloud on the right in under 2 seconds.

Potassium Nitrate 

60 %

Sugar 

40 %

Although the two ingredients can just be finely powdered and mixed together, in recent side-by-side tests, we found that melting the two together does in fact make a superior Smoke Bomb.

To melt the mixture together, you'll need small metal saucepan or other heat resistant container, and an electric hot plate. An electric hot plate is preferred to an open flame heat source because it's a tad safer, and easier to prevent overheating of the mixture.

The mixture must be heated SLOWLY, and over a LOW heat until it just starts to melt.

Heating it too quickly, or at too high a temperature will cause it to turn black, burn & ignite making a giant mess, not to mention a fire hazard. In any case, this should all be done outside just in case you overheat it does happen to ignite. As the mixture begins to melt, it will turn brown and look exactly like Carmel Candy (see image above)... after all, you are melting Sugar ( and no, you can't eat it ).
A step-by-step procedure is outlined below....

Ingredients

Equipment you will need:

    • Plastic container with snap-on lid
    • Digital scale (that measures grams precisely)
    • Heat resistant container (to melt the substances together in)
    • Hot Plate

Procedure

 

Start by making a small size batch (50 grams total). Measure out 30 grams of Potassium Nitrate and 20 grams of Sugar into a small cup. For those of you who cut math class, 30 grams of Potassium Nitrate and 20 grams of Sugar is still a 60% / 40% mixture. If you make a batch larger than 50 grams, it will be very difficult to mix and heat evenly. You can always make more, so don't mix up a giant batch.

 

Snap a lid on the container and shake to mix the two chemicals together. Pour the mixture into a heat resistant container and set it on your hot plate.

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