Amsterdam acrylic ink in Burnt Umber (409) is an opaque color with a very good lightfastness ( and ).   Amsterdam acrylic ink Our acrylic ink combines the best properties of ink with the benefits of acrylic paint – the ultra-fluid, vibrant colors don’t fade and dry quickly with a permanent finish. Ultra-fluid acrylic, made with a high concentration of high-quality, lightfast pigments Odorless, water-based formula that becomes waterproof and permanent when dry Extensive collection of 56 colors with a wide variety in opacity, including 17 Specialty Colors (metallic, pearl and reflex finishes) Stable bottle with a wide opening and dropper cap Can be used straight out of the bottle with airbrushes, technical pens, fountain pens, brushes or the included dropper Suitable for various surfaces, but smooth surfaces like plastic and metal should be primed before use with a suitable primer Proudly crafted in Europe