Hong Kong friends, before you get too scared about the rumors of "fluorescent powder" being used by police, please remember that laundry detergent glows brightly under a blacklight.https://www.youtube.com/watch?v=ewp-rngZtTU …
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For example, petroleum jelly, and skin products that contain it: http://www.webexhibits.org/causesofcolor/11F.html …
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Ic! It make sense! Thx!
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