Cotton cannot be dyed with fluorescent dyes, therefore Fluorescent colours cannot be found in the Pantone Fashion, Home +Interiors Cotton TCX range.
To supply fluorescent trend colours Pantone developed the Nylon Brights Swatch ring which contains 21 super bright colours – brighter than can be achieved on Cotton. The colours are dyed on Nylon 6,6 to optimise lightfastness and wash fastness. Of the 21 colours, 14 contain flavine or rhodamine acid dyestuff which qualifies them as true fluorescents in that they absorb ultraviolet light and emit it as visible light which increases the perceived brightness of the colour. Additional fluorescent colours are also available in the Polyester Swatch Book