How to Make Black Powder Mini Explosive




About: I am homeschooled. I used to go to a Christian school, but we got tired of all the unneccessary rules and stuff. I like to skate and bike. I have an old go-cart and a 1970 Kawasaki 90. When it's hu...

In this Instructable I will show you how to make a mini explosive (firecracker) using black powder (or pyrodex).

NOTE: The amateur manufacture of fireworks may be illegal in some areas. Also, know your local laws in regard to what constitutes fireworks as opposed to bombs. This instructable is not about bombs, but fireworks for diplay purposes. Always follow proper safety precautions, including but not limited to protective eyewear, protective clothing and hearing protection. I am not responsible for accidents or misuse of this information as it is for INFORMATION PURPOSES ONLY.

Step 1: Gather Materials

You will need:
black powder
a knife
strong tape or strong sticky paper (I used aluminium flashing tape)
fuse (slow burning)
and a small container

Step 2: Measure Black Powder

In this step you need to fold your piece of paper in half and use this to help with pouring the black powder. Caution: When pouring black powder (or pyrodex) make sure no ignition source (extreme heat, static electricity, open flame, spark, etc.) is present.
Measure (40 grains is ideal) and pour some black powder into the paper and then use this to pour it into the small container.
(try not to spill any)
Put cap back on black powder can.

Step 3: Insert Fuse

Insert fuse into middle or side of container. Make it go as close to the bottom as possible. Make sure you have SEVERAL seconds of fuse left sticking out.

Step 4: Wrap Container

Now is the time to wrap the container that is filled with black powder and a fuse, with tape. You can use duck tape (duct tape)or some other super strong tape. (I used aluminium flashing tape). You need to wrap this tight and make sure that it is well sealed. Once you wrap the container with all the tape, use the back of the knife to press down all the seams real good.
(I wrapped mine three times covering the weak spots with top layers.)

Step 5: Light It and Run

Now that you have this explosive finished you are ready to go outside in a safe place and light it. Make sure you run away and then watch from a distance.
It can be loud.
It is dangerous!

(Pyrotechnics are to be undertaken at your own risk! These instructions are for INFORMATIONAL PURPOSES ONLY! I am not responsible for any accidents or injuries that you might encounter.)

I have a video but I can't figure out how to load it yet.



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      14 Discussions


      9 years ago on Introduction

      I think that the legal limit for a firecracker is 500 mg of blackpowder. Anything higher than that is considered an explosive device.

      Hold on, I gotta do a little math.
      A grain 64.79891 mg
      So 40grains x 65mg (round it up)=2500 mg

      So that means if I construct this, it will be classified as an explosive device.
      That is unless I did my math wrong. Which is totally possible.

      1 reply

      Reply 9 years ago on Introduction

      A can of BP like that is about $16. We bought the fuse at a gunshow, but we're learning to make our own.


      Reply 9 years ago on Introduction

      cool Im making my own currently but there is a gunshow once a year where I live Ill keep that in mind next time it comes up


      10 years ago on Introduction

      The video needs to be uploaded "online" YouTube or another host, and then you can reference it here.


      10 years ago on Introduction

      Dude, be careful! Remember, stay away from the smokeless powder. Remember the exploding rifle that left a piece of metal in your hand and me deaf for 2 days?

      4 replies