Metal Box of 12 Colored Pencils gray tones Rembrandt Polycolor Lyra Polycolor Rembrandt colored pencils offer a wide selection of colors that are applied to light papers, and preferably white, to achieve exceptional intensity and brilliance in the drawing. Combine all shades of gray, cold and warm. Colored pencil strokes do not require an underlying base to adhere to the paper, but rather are achieved by combining highly stable pigments with a high-quality binder. This process produces a tool for professional artist use. The round body is made of the best cedars, approved by the Italian forest certification system (PEFC). The tip of the pencil is immersed in the same color as the body, which guarantees a uniform tone. The lead of Rembrandt colored pencils has been improved to a diameter of 3.7 mm for better performance, and contains pigments that are resistant and permanent to UV rays. They are waterproof, vivacious and brilliant, allowing a perfect combination to create a wide variety of shades, tones and shades. Brand: Lyra.