Invisible blue is milky under normal light and fluoresces light blue; intermixable with the Off Broadway range it will brighten these colours.

For maximum effect fluorescents are best applied onto a white surface and may be used to paint virtually any substrate including canvas, wood, plaster, various plastics and metal.

Coverage 8 - 9 square metres per litre.

Flints can also provide UV lights for both purchase, and hire.