The Zeta Series features extra heavy-weight paper with a white cold-press surface that is suitable for all dry media and ink, as well as watercolor. The wirebound hardcovers are made with extra heavy-weight binders' board that is tough and resistant to warping. The paper contains both internal and surface sizing, is pH neutral, lignin and chloride-free, and 270 gsm. thick.
Each book contains 25 sheets. By Stillman & Birn.