QUOTE (Betty @ Jan 17 2006, 11:06 AM)
I have a 10 pack of Gelly Roll Moonlight gel pens that are supposed to glow under blacklight, but I don't have any blacklight at home. What is blacklight used for?
It is "light" mostly in the UVA range, and what it does is light up anything phosphorous. When visible normal light is absent, only the lit up phosphor is visible. When the visible spectrum is also present in the source, the phosphor light emission can be overpowered to remain invisible (someone correct me if I am wrong). You can probably buy a black fluorescent or incandescent bulb at places like Home Depot. Applications are many, and I think they include marking dollar bills, tracing fluid leaks, and even making fish glow in aquariums
I imagine this ink is just plain water with some phosphor and mold supressant added. I guess it can be used to write secret notes, whether sophomoric, romantic, or criminal

So such activities can now be conducted with class by using a FP instead of a lowly gel pen or marker