A sign board capable of producing {HEAD ~ multi color visual effects} upon {TAIL ~ exposure} to ultraviolet light, said sign board comprising: 
upon
A sign board capable of producing { HEAD ~ multi color visual effects } upon { TAIL ~ exposure } to ultraviolet light , said sign board comprising :
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH