Derwent Lightfast Pencils have been formulated to be 100% lightfast. The revolutionary oil-based core creates a buttery, velvety texture, and also resists to prolonged colour change, ensuring artwork will not fade for 100 years under museum conditions. Rich, vibrant colours deliver a rapid and opaque laydown and can be mixed on the page to create a paint-like effect. A strong point makes them perfect for detailed drawing and layering techniques. All colours comply with ASTM D6901 and Blue Wool Scale ISO 105.This tin includes 24 colours: Sun Yellow, Scarlet, Salmon, Violet, Mid Ultramarine, Mallard Green, Brown Ochre, Yellow Ochre, Sandstone, Natural Brown, Black, White, Champagne, Heather, Blue Violet, Dark Turquoise, Racing Green, Seaweed, Wheat, Venetian Red, Ruby Earth, Chocolate, Van Dyke Brown and Mist.