[3.5 x 5.5 150 gsm (Heavyweight) Ivory]
[5.5 x 3.5 150 gsm (Heavyweight) Ivory]
[5.5 x 8.5 150 gsm (Heavyweight) Ivory]
[8 x 10 150 gsm (Heavyweight) Ivory]
GAMMA SERIES ? SOFTCOVER SKETCHBOOKS Stillman & Birn Gamma Series Softcover Sketchbooks, 150 gsm (Heavyweight), ivory paper, medium grain surface. Suitable for dry media, light wash and ink. Example of recommended usage: working in pencil or ink mixed with watercolor. Softcover bindings are flexible and lightweight and open totally flat. Acid-free, chloride-free, lignin-free.