JUST ARRIVED – DERWENT LIGHTFAST PROFESSIONAL QUALITY PENCILS – Available in sets of 12 – 24 – 36 – 72, 100% Lightfast Oil-based Coloured Pencils have been formulated to be 100% Lightfast.  The revolutionary core is resistant to prolonged colour change ensuring artwork will not fade for up to 100 years under museum conditions.  It’s smooth oil base creates a rich vibrancy and can be mixed on the page to create a paint-like effect.  Discover this range which are compatible with alternative mediums and pencils.  All colours are professional quality and comply with the international lightfast testing standard ASTM D6901 y Blue Wool Scale ISO I05