Thank you for viewing. Although this item is unopened, it has been in someone's possession, so please refrain from purchasing if you are concerned about its condition and instead buy it from a store. Shipping will be by postal mail. Thank you. Oil-based colored pencils boasting unparalleled lightfastness. Luminance 6901 is an oil-based colored pencil that has cleared the ASTM D6901 lightfastness standard set by "ASTM International" of the United States, the world's largest private, non-profit international standards organization. Luminance 6901 is a top-of-the-line oil-based colored pencil that combines exceptional lightfastness, meeting the ASTM D6901 standard, with a soft and creamy feel, allowing artists and professional creators to preserve their artwork in its original state, even in challenging environments.