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Yes. You can add Tonic Water to the BC-- it will glow under a blacklight since Tonic Water contains quinine, which reacts to a blacklight. Also of course this route is nontoxic.
I am not sure however which color bc works best or how much is required to produce a good glow. What I am sure of though is that a blacklight must be shining on the cake to make it glow.
do a search for glow in the dark cake. I remember there being a picture in the gallery of a cake that a decorator did get it to glow.
I don't remember the poster's name, but I do remember the cake. The decorator detailed how she achieved the cake to glow.
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