Lances yellow flames

Yellow flames for lances may be derived from compositions based on sodium nitrate or sodium oxalate, together with magnesium as fuel and a binder such as linseed oil. 

Figure 10.4 The combustion process in lance (or similar firework) yellow flames.

Other coloured flames follow similar physico-chemical phenomena but operate in different regions of the spectrum. Consequently, the maker of the coloured lance has at his disposal copper salts for blue, strontium salts for red, sodium salts for yellow and barium salts for green, as shown in Table 10.2. 

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