Any recipes for a colored smoke bomb that will last up to 20 minutes?

Need a colored smoke bomb that will last up to 20 minutes for the 4th of july (Red white %26amp; blue). Any ideas for a colored dye that will work?Any recipes for a colored smoke bomb that will last up to 20 minutes?
use the potassium nitrate and sugar composition found on Google.


then simply add 3 heaped table spoons for every 100g of K No3 of the


powdered dye (color you want) after the mixture has been combined.


the dye has to be added while the mixture is still on low heat.


slow down the reaction with 1 teaspoon of bi carb soda.


it will burn at about 15/20 min per metre if a tube of diameter of 20cm is filled.





have fun.