A Black Light Poster is printed with ink that fluoresce under black light due to the ink containing phosphors which made them glow when exposed to the ultraviolet light that emits from black light bulbs.
Originating in the 60's and 70's black lights have seen a huge resurgence in the last couple of years.
You can purchase black lights from any good D.I.Y stores.
Dimensions: 55 x 85 cm
Available block mounted