Radiant White: Texturally, Radiant White is the shortest (most buttery), brightest, whitest Gamblin white - excellent for abstract paintings and a good choice if the color white is critical. It's bound with poppy oil, which does not dry as fast as linseed oil.

Pigment: Titanium Dioxide (PW6)
Vehicle: Poppy oil
Lightfastness I, Series 2, OPAQUE

reference: www.gamblincolors.com