Derwent\'s first oil-based coloured pencil in a tin of 24. Derwent Lightfast pencils are oil-based, smooth and creamy with a beautiful laydown of rich colour. Designed to resist fading, artwork will not fade for up to 100 years under museum conditions. What\'s more, they can even be used with a medium giving a painterly effect when dissolved. Derwents Lightfast pencils Vivid colours are specially formulated to combat the effects of UVA radiation and are 100% lightfast meaning they are guaranteed to last 100 years under museum conditions, Ideal for works on permanent display. Creamy texture with a wide core for dense colour application, Easy to blend and layer - can also be mixed with other mediums to create new colours The Easy-to-grip round barrels fit standard pencil sharpeners. This set also comes with an attractive tin with removable lid for easy access to pencils without taking up space on your desk. - Brand: Derwent - Set of 24 - Lightfast: Complying with ASTM D-6901 and Blue Wooll Scale ISO 105 - Oil-Based: Oil-based coloured pencils - Mediums: Compatible with oil mediums - Point: Strong point for detailed drawing - Colours: Available in 36 vivid and opaque colours