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Citric acid and ultramarine blue


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Hi all,

The question relates to an old time pyro who told me a formula based on orpiment.

I know it's toxic. But, just wanted to ask the role of pigment ultramarine blue in a flare with other components of kno3,sulphur, charcoal and orpiment.


He also said that they used citric acid for a glittering fountain formula based on kno3,sulhur, charcoal, baking soda and magnalium.


Just want to know the role if any, of ultramarine blue and citric acid.



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