Purple UV Reactive Water Dye

Moderate effectiveness

Applied the small bottles to 1/2 gallon of water, twice the seller’s suggested concentration. Squirted each other on bare skin with moderate success. Used 2 each 60 watt UV lamps at about 8-10’ range. Yellow worked best, others less so. Back yard was dark, otherwise unlit. Moderate brightness. In future I will use a stronger concentration. Had fun with it.