Picture of Ninja bombs

Have you ever seen the Batman movies and been amazed at all the gadgets the dark knight packs into his utility belt? Well I did the research and came up with a way to put you into Gotham's greatest hero's shoes by creating his famous smoke pellets!

This is an impact smoke pellet, which means when it strikes something with enough force it'll go off. How it works is by a chain reaction of different things to ignite the smoke-creating element.

Remove these adsRemove these ads by Signing Up

Step 1: Materials

Picture of Materials


-Snappers (left over fireworks)

-Tissue paper

-Black Powder

-Magnesium Fire Starter

-Potassium Nitrate and Sugar mix (there are some instructions on how to make this online for more info)



-Ping Pong Balls

-Black Spray Paint

Step 2: First Layer: Snappers

Picture of First Layer: Snappers

To start, cut two equal sized squares of tissue paper. Set one aside for now.

Next take 3 snappers and cut them open. Pour them all into the center of the tissue paper. Set this aside.

Step 3: Grinding the Magnesium

Picture of Grinding the Magnesium
Take your magnesium fire starter and remove the flint rod from the magnesium (I did so by clamping a large nail in a vise and placing the flint rod on the point and hammering down gently).

The next step will be to grind this into powder. Take your file and lay it down. Then slowly and gently scrape the flint rod along the file. You can then transfer this dust onto a small sheet of paper.

Keep doing this until you get a decent sized pile (use my image as a reference). Once you have enough just sprinkle it on the layer of snappers you previously laid down.

Step 4: Black Powder and Potassium Nitrate

Picture of Black Powder and Potassium Nitrate
The next part will be adding a little more flammable fuel to your smoke pellet. Take some black powder/ gun powder (If you can't manage to find this as is, then try opening something that has it inside it. i.e. firecracker (just the black powder not the bentonite)) and sprinkle it onto the snappers and flint. It is important that you don't mix these when combining them, we need them to ignite in a specific order.

The final part will be putting a chunk of your potassium nitrate mix on top of it all.

Jason da god13 hours ago
BATMANluc25 days ago
Where did you acquire the black powder?
ladymda1 month ago

If you throw this at carpet will it catch on fire?

CaptainA11 month ago

How do I make the smoke bigger so when I throw it down no one can see me thru the smoke??

coke872 months ago

what if i dont have a magnesium fire starter? can i use something as a substitute for the flint rod??

Asamati98 (author)  coke872 months ago
I would assume anything that easily ignites (some kind of powder would be the best way to go).
coke873 months ago

and what is Spectracide Stump remover? is it a substitute for the KNO3?

Asamati98 (author)  coke873 months ago
It is KNO3, Spectracide is the brand and it is sold as stump remover. you could find it at Walmart or most gardening/landscaping type stores.
coke87 Asamati982 months ago

I tried to find some KNO3 but no luck. Can I make these smoke pellets even if i dont have KNO3? I have everything except potassium nitrate. Can i still make these if i dont have KNO3??

coke873 months ago

where can i find some potassium nitrate and spetracide stump remover to create this awesome DIY??? please help because i am gonna make this ASAP but i need to know from my question above. Thanks

Cyberdalek6 months ago

I hope you are joking about the steal part

just judging by the measurements you used it didn't make that much smoke obviously using more then one would make more smoke but would upping the amounts inside of one create more or would that just make it more volatile?

CBlaskowsizzle10 months ago

is the smoke it produces toxic?

No gunpowder smoke is entirely safe to breathe in. It's not safe to eat though.

Cyberdalek9 months ago

what do you use if you cant get gunpowder?

Just steal some shotgun shells and cut off the plastic end. Then separate the lead and gunpowder

metalshiflet8 months ago

Would this be usable inside?

ianmcmill11 months ago

It crosses my mind that I have some KNO3 laying around in my bedside cabinet (no joke).

Why are ping pong balls optional ? Aren't they mandatory ?

Asamati98 (author)  ianmcmill11 months ago
No actually they work when wrapped in the tissue paper just fine, the ping pong ball shell is just to give it that "Dark Knight" look. (I figured I would put that little disclaimer thing in to warn people that if they make the shell it will melt and there is no getting it back.)
Eunix1 year ago

Nice! If I had access to KNO3 I would probably add a little more of it with some sulfur maybe, to get more smoke.

Asamati98 (author)  Eunix1 year ago
Oh yeah good idea, and I don't know if you've already checked on this but I got mine from Walmart for $4. It was sold as "Spectracide Stump Remover".

Yeah, but where I live thy don't sell stump remover, and any kind of obvious chemicals that could be used in explosives are ilegal...

Asamati98 (author)  Eunix1 year ago
Oh that sucks, well if you can at least access black powder I suppose you could just use more of that... You can get a decent amount of smoke from just black powder.

Well I guess where potassium nitrate is under regulation, black powder is accessable at every gas station ;). I wonder why such explosive compounds are available in a country like the US. Oh, yeah they sell guns at wallmart too. Haha.

S0uraV_DAS1 year ago

Nice work! Now we can all use this stuff and create smoke in the math class!!(just kidding)

willnate1 year ago
Hate to break it to ya but that rod is flint and the rest is magnesium
Gabse1 year ago
Kipkay made this a few years ago