Vanadium Yellow

It has been proposed to employ the beautiful golden-bronze crystals of meta-vanadic acid as a pigment. They possess, when finely ground, an intense colour, like that of a very rich golden ochre, but less earthy, and more brilliant. This pigment has remarkable covering power, and works admirably both as an oil and a water-colour. Although the material is somewhat costly, the price for which it could be prepared need not preclude its use.

But, unfortunately, this colour is not permanent. A few hours' exposure to sunshine of a water-colour wash of vanadium yellow suffices to change and deteriorate its hue in a marked degree.