Derwent Lightfast pencils have bean formulated to be 100% lightfast. The revolutionary core is resistant to prolonged colour change ensuring the artwork will not fade for up to 100 years under museum conditions. Its smooth oil base creates a rich vibrancy and can be mixed on the page to create a paint-like effect. Discover this range of 100 colours which are compatible with alternative mediums and pencil. All colours are professional quality and comply with international lightfast testing standard.