And for the sake of disclosure I was inspired by this gentleman's work. The "softness" of the image adds an ethereal quality I like.
Step 1: Equipment
An Ultraviolet irradiator, I used my FOD but a compact fluorescent blacklight in a reflector should work also.
A target holder, I used a pair of helping hands.
A convex lens, mine was sourced from a pair of binoculars.
A measuring stick
A fluorescent screen.
A dark room (by which I mean a room you can make dark)
A target ( preferable one which shows strong disparity in appearance under UV irradiation compared to visible light, so as to prevent DIGGer's from dying of apoplexy when you do something they're convinced can't be done.) In this case a yellow lantana.