"David, The Head" Neon Blacklight Poster, 1970 by CalanBlacklight posters were a main ingredient of the psychedelic movement. They were part and parcel of the hippie lifestyle, an essential part of the trip.“The blacklight poster was actually a medium capable of mimicking the effects of the new wonder drug. With the ability to glow and vibrate under ultraviolet light, the posters could simulate the sensations and visual distortions one experienced during an acid trip.” says Daniel Donahue in his introduction to kick off his 2009 compilation, Ultraviolet: 69 Classic Blacklight Posters from the Aquarian Age and Beyond. Love how a couple are...