Smoke Composition #1
Source: rec.pyrotechnics
Different sources mention differnt compositions. The most often mentioned one is given here.
Preparation: The mixture is most succesfull when prepared by melting the sugar and potassium nitrate together on low heat, but this requires good stirring, and there is a risk of accidential ignition. The molten mixture can be poured in cardboard containers and a fuse insterted while the mixture solidifies.
Smoke Composition #2
Source: rec.pyrotechnics — U.S. military smoke composition
The mixture is difficult to ignite. Hexachloroethane is poisonous, and can be replaced by 72 parts PVC. This, however, makes the mixture yet harder to ignite. The zinc oxide can be replaced by titanium dioxide (2 parts ZnO replaced by 1 part TiO2). The smoke is slightly irritating and not suitable for indoor use.
Smoke Composition #3
Source: "Spelen met vuur"
Smoke Composition #4
Source: "Spelen met vuur"
Smoke Composition #5
Source: Kirk-Othmer Technical Encyclopedia — chapter "Explosives and Propellants"
Heat of reaction: 2.579 kJ/g, Gas volume: 62 cm3/g, ignition temperature: 475°C, impact sensitivity test: 15% of TNT