Derwent Lightfast Pencils are specifically formulated to be 100% lightfast, ensuring that your artwork remains vibrant for up to 100 years under museum conditions. These professional-quality pencils feature a revolutionary oil-based core that delivers rich, vibrant colors with a quick, opaque laydown. Perfect for blending, mixing on the page, and achieving a paint-like effect, these pencils offer both precision and versatility. The strong point allows for detailed drawing and effective layering techniques, making them a must-have for professional artists seeking long-lasting, high-quality results. Each pencil meets ASTM D6901 and Blue Wool Scale ISO 105 standards for lightfastness.