There is a myth often repeated that Unbleached Titanium is what all Titanium White looks like before the brownish impurities are bleached out of the color. The truth is far more interesting and it is one of the few instances where a new color originates with a fortunate accident for an artists paint manufacturer. The color started with the contamination of a batch of Titanium White with some umber or ochre back in the 1960’s by Bocour (Leonard Bocour, contemporary paint manufacturer based in New York founder of Bocour Artist Colours Co., which supplied paint to artists like de Kooning, Helen Frankentaler, Morris Louis, Kenneth Nolan and many others).
Chemical Description: Blend Titanium dioxide, synthetic hydrated Iron oxide & synthetic Iron oxide
Pigment Numbers: PW6 PY42 PR101
Lightfastness Rating: ASTM I
Pigment Opacity: Opaque
Paint Opacity: Opaque