Holbein Meltz Colored Pencil Blender Pen (OP801) Holbein Meltz Colored Pencil Blender Pen is a transparent liquid blender marker . Double-ended with bullet and brush tips, use the blender over Holbein Artists’ Colored Pencils to blend colors, create subtle graduations, and brush-like effects. It is conveniently blend, blur, soften, and mix colored pencils with MELTZ, Holbein’s water-based blending thinner. Achieve stunning blending, gradations, or brush stroke-like effects by applying MELTZ to an area already covered with pigment. MELTZ is solvent-free, so it’s safe for use with watercolor brushes and provides great results with no harmful fumes This powerful blending solution is designed to work seamlessly with Holbein Artists Colored Pencils, allowing you to take your artistic creations to the next level! Dual-ended marker features fine bullet and fiber brush tips. While some colors are more difficult to mix or blend, color mixing is best done when HOCP has been applied in a cross hatched or a layered pattern.