Conveniently blend, blur, soften and mix HOCP with MELTZ, a water based blending thinner in a new double-ended pen! Blending, gradations or brushstroke like effects can be achieved by using MELTZ on an area already covered with HOCP. While some colours are more difficult to mix or blend, colour mixing is best done when HOCP has been applied in a cross-hatch or layered pattern. MELTZ pen has brush and a bullet double ended tips.