white are linseedoil based, while the other whites are based on safflower oil. linseedoil produces a strong film but does yellow somewhat over time. safflower oil produces a film with other properties but shows virtually no yellowing. white based on safflower oil in a layered buildup of a painting...
the traditional steam-distilled blue oil. since a co extraction contains all the oil soluble parts of the plant, the oil is much thicker, with specks of what appear to be plant matter in it. it also does not turn blue as expected. picture a deep, dark green or brownish green semi-solid, pasty texture...