+fizzymagic Posted May 23, 2013 Share Posted May 23, 2013 I am currently exploring ideas of how to make invisible ink appear once you submerge something under cold water. Wax. Use a colorless crayon or a white candle. Green Achers did one like that a few years ago out in the Central Valley. You had to spray a concrete wall with water to see the message. There is also a a glow-in-the-dark crayon that responds to UV light. Quote Link to comment
+OZ2CPU Posted May 23, 2013 Share Posted May 23, 2013 any cache night/multi/puzzle that require the use of UV light should use the attribute UV else it is just plain bad style !! UV light is a cool toy, and very nice and funny to use for night caching. Quote Link to comment
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