Caran d'Ache Luminance 6901 Pencils are professional quality artists' coloured pencils. They combine the best light fastness with the smoothest permanent lead. Two years of research went into developing the formulation for Luminance 6901 in the greatest secrecy in the Geneva workshops. This work has been based on best pigments and the know-how guaranteeing the Swiss Made quality. Luminance 6901 complies with the ASTM D-6901 standard, the highest international standard concerning coloured pencils' light fastness.
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