Iwata-Medea Com-Art Color Kit, Kit B Opaque Secondary Because of a common hydro-carbon base binder, Com-Art transparent and opaque colours can be used together without bleeding between colours Non-toxic, ready to use paint is specifically formulated for use with an airbrush and never needs to be filtered or strained Heavily pigmented and light fast, allowing for accurate 4 colour separations Superior atomization, smooth spraying, and they dry instantly For use on paper and plastic (some base coating may be required for plastic).Not for use on metal or fabric.