"Is a regular carved Halloween jack-o-lantern too tame for you? Or are you looking for the perfect flame test chemistry demonstration? Use colored fire to light your pumpkin and then coat it with rainbow fire. It's an easy dramatic effect. Alcohol serves as the base flame. It burns blue and won't interfere with other colors. Boric acid produces a green flame. Other colors come from natural chemicals in the pumpkin and incandescence."
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