Welcome to Discover The Science! Read, comment and enjoy... Latest News: Happy Summer 2011! Visit our new store! Get all the materials for your projects here
Your Ad Here

Saturday, March 13, 2010

Sci - Project : Homemade Smoke Bomb

It's summer, and you are bored. Fun with science?? why not!
This is a homemade project about making smoke bomb, it's not a cheap ping pong plastic ball smoke bomb, but the real epic materials.

The smoke bomb you would purchase from a fireworks store usually is made from potassium chlorate (KClO3 - oxidizer), sugar (sucrose or dextrin - fuel), sodium bicarbonate (otherwise known as baking soda - to moderate the rate of the reaction and keep it from getting too hot), and a powdered organic dye (for colored smoke). When a commercial smoke bomb is burned, the reaction makes white smoke and the heat evaporates the organic dye. Commercial smoke bombs have small holes through which the smoke and dye are ejected, to create a jet of finely dispersed particles. Crafting this type of smoke bomb is beyond most of us, but you can make an effective smoke bomb quite easily. There are even colorants you can add if you want to make colored smoke. Let's start out with instructions for the easiest/safest type of smoke bomb you can make:
Smoke Bomb Materials

Once you've gathered your smoke bomb materials, you are ready to make one!
  1. Pour about 3 parts potassium nitrate to 2 parts sugar into the skillet (5:3 ratio is also good). Measurements don't need to be exact, but you want more KNO3 than sugar. For example, you can use 1-1/2 cups KNO3 and 1 cup sugar. If you use equal amounts of KNO3 and sugar, your smoke bomb will be harder to light and will burn more slowly. As you approach the 5:3 KNO3:sugar ratio, you get a smoke bomb that burns more quickly.

  2. Apply low heat to the pan. Stir the mixture with a spoon using long strokes. If you see the grains of sugar starting to melt along the edges where you are stirring, remove the pan from the heat and reduce the temperature before continuing.

  3. Basically you are caramelizing sugar. The mixture will melt and become a caramel or chocolate color. Don't forget to add the dye powder to the pan. Continue heating/stirring until the ingredients are liquefied. Remove from heat.

  4. Pour the liquid onto a piece of foil. You can pour a smaller amount onto a separate piece, to test the batch. You can pour the smoke bomb into any shape, onto an object, or into a mold. The shape and size will affect the burning pattern. Put the fuse in the middle before it's hardened.

  5. If you aren't going to clean your skillet immediately, pour hot water into the pan to dissolve the sugar (or else it will be harder to clean). Clean up any residue you may have spilled out of the pan, unless you want mini-smoke bombs on your stove top.

  6. Allow the smoke bomb to cool, then you can peel it off the foil.
Now that you've made your smoke bomb, it's time to light it...
WATCH THE VIDEO TUTORIAL!
if you're not feeling to read...


Share |

7 comments:

  1. thanks for the tips man!

    ReplyDelete
  2. This kind of information is very limited on internet. Nice to find the post related to my searching Project management dissertation . Your updated and informative post will be appreciated by blog loving people.

    ReplyDelete
  3. I'm going to attempt to make one as good as commercial ones, I've tried making one before and it seemed it didn't last as long as I had hoped, and it dissipated too fast. I think this was mainly because I did not use a dye. I think it may be more important than just for color, but I'm not sure. I'm going to experiment with different factors and designs when I have nothing better to do... I'm weird like that.

    ReplyDelete
  4. I might try more baking soda too...

    ReplyDelete
  5. I think if you use dye it doesn't really matter, the main factor is I think is the mixture, try adding baking soda.

    ReplyDelete
  6. Awesome! Used about a 5:3 ratio, burned really fast and about an eight inch flame. Maybe we'll try more baking soda next time. Navy blue rite dye from Walmart did not work well. Thanks for the excellent post.

    ReplyDelete