Neon colors which emit a glow. Work best over a white base color such Opaque White. Fluorescent colors are NOT lightfast. The color's fluorescence is due to the pigment being in a rapid state of decay. Fluorescent colors are not intended for permanent finishes.To work with underpasses to 0.5, reduce with either 5608 Createx Illustration Base, Wicked W100 or Auto Air 4011 Flash Reducer.