Layout 45 lb is an extra white, super smooth paper that is especially well suited for alcohol markers. It is highly bleed-proof and therefore lends itself perfectly to color blends and gradation. It is perfect for pencil and India ink, as well as inking (pen, liner, nib) and coloring (alcohol markers and other felt tips). In spite of its weight, the paper is still transparent, which is a useful additional feature. This paper is acid-free and pH-neutral. Vegan friendly.