Science, Tech, Math › Science Safe No Cook Smoke Bomb Instructions How to Make a Smoke Bomb, Safely Share Flipboard Email Print Most smoke bombs produce white smoke. kayla varley / Getty Images Science Chemistry Projects & Experiments Basics Chemical Laws Molecules Periodic Table Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. our editorial process Facebook Facebook Twitter Twitter Anne Marie Helmenstine, Ph.D. Updated June 04, 2020 The classic smoke bomb is very easy to make, but I know some of you are concerned about the possibility of accidentally setting off your smoke alarm or igniting the mixture during preparation. There is safer way to make a smoke bomb. It uses the same ingredients and produces a comparable amount of smoke, but it takes a bit longer to make. Here's how to make the safer smoke bomb. Smoke Bomb Ingredients potassium nitrate or saltpeter (if you can't find it at a garden store I see Skylighter sells it online)sugar (sucrose)waterfusepaper or plastic cupsplastic spoonwaxed paper Construct the Smoke Bombs In a paper or plastic cup, mix 3 parts potassium nitrate with 2 parts sugar (e.g., 3 tablespoons potassium nitrate and 2 tablespoons sugar).Using your plastic spoon, stir in just enough water to make a thick paste. Continue stirring until the ingredients are evenly mixed.Set lumps of the mixture (~1 tablespoon each or a little less) onto the waxed paper. Insert a fuse into each lump.Allow the smoke bombs to set up for 1-2 days. The drying time will depend on temperature and humidity. Warmer and drier is faster; cooler and damper will take longer. Keep the smoke bombs away from excessive heat or flame. The smoke bombs will be like clay when they are ready, not hard and solid.Set a completed smoke bomb outdoors on a fireproof surface and light it. Disclaimer: Please be advised that the content provided by our website is for EDUCATIONAL PURPOSES ONLY. Fireworks and the chemicals contained within them are dangerous and should always be handled with care and used with common sense. By using this website you acknowledge that ThoughtCo., its parent About, Inc. (a/k/a Dotdash), and IAC/InterActive Corp. shall have no liability for any damages, injuries, or other legal matters caused by your use of fireworks or the knowledge or application of the information on this website. The providers of this content specifically do not condone using fireworks for disruptive, unsafe, illegal, or destructive purposes. You are responsible for following all applicable laws before using or applying the information provided on this website.