It's little surprise that day-glo items like highlighter pens fluoresce under Ultraviolet but who would have guessed that Indian Tonic Water is also fluorescent? It's the quinine in it that causes the fluoresence.
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Fluorescent Tonic
Friday, 31 Dec 2021, 19:44
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Hi Richard,
Very pretty, reminds me of a lava lamp!
Gill
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Gosh !!! I remember those, I loved them
R.