Blackwing Blue Coloured Pencil (Single) by BlackwingBlackwing Blue coloured pencil by Blackwing. Features a non photo blue core that fades when scanned or photocopied, a unique feature that brings convenience to artists and illustrators. The pencil features the same functional design aspects as other Blackwing pencils, including the large, rectangular eraser that can be extended as it wears down. The eraser is latex free, and replacement erasers are available in a range of colours. Non photo blue cores