From the manufacturer's website:

The Quickshade Green Tone Wash is loaded with deep green and heavier dark pigment in the popular Warpaints ink resin base. Use on top of white for an instant green toned and shaded miniature or on top of all greens, Necrotic Flesh or even Barbarian flesh for the putrid look.As all the Quickshade Inks, it looks stunning on a metal primer for that Nurgle look.Shading and colour toning in one wash.