It is very simple to make effective homemade smokebombs. All of these will produce thick clouds of smoke with little to no flame.
POTASSIUM PERMANGANATE + GLYCERINE
Mix a 1:2 ratio of potassium permanganate and glycerin in a matchbox, shut the box and shake. The delay will depend on the temperature of the day and grain size of the P.P crystals, the hotter the day and smaller the crystals the shorter the delay. After the delay the box will fizz and emit a cloud of white smoke.
POTASSIUM NITRATE + SUGAR
Mix equal parts potassium nitrate and sugar in a metal or glass bowl; this is then carefully melted over a hot plate. This molten mix is poured into the container (I found toilet paper rolls are a good size), a fuse is inserted and it is left to set. The toffee like mix that you now have is the smoke bomb, and is ready for ignition.
AMMONIUM NITRATE + NEWSPAPER
Probably the easiest and most effective of the homemade bombs is this one. It?s become my favorite. All that?s needed to do is make a strong solution of water and ammonium nitrate, in this soak a newspaper, when saturated take out and hang in the sun to dry.
When dry roll up as tightly as possible and tie up with string. Just ignite the end of the roll of treated newspaper and it will fizz like a rocket and blast out thick clouds of white smoke.
SMOKELESS POWDER + PVC SOLVENT
In a bowl add some smokeless powder, to this powder add just enough PVC solvent/cement to bind the powder together, mould this mix into the shape desired and let dry.
This can?t be ignited by bare flame or it will simply burst into the flame, what?s needed is something red hot such as a match that has just been blown out or a red hot wire.
PINGPONG BALL + ALUMINIUM FOIL
This is probably the easiest to make and quite effective, made by wrapping a ping pong ball with foil and heating over a flame.
When it starts to fizz chuck away and either smoke will pour out of it or if you?re unlucky it will burst into flames.
Cheers!