pyrodoc Posted March 13, 2015 Posted March 13, 2015 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. Regards
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