MD Notebook Thick Blank A5 AThick, robust paper you can rely on This notebook is made with MD PAPER Thick, a thicker paper that provides all the same comfort as the standard MD Notebook with extra protection from bleed through. The photobook sized A5 notebook has an unconventional long, narrow space where your ideas can run free. MD PAPER Thick is around twice as thick as standard MD PAPER, providing further protection against ink bleeding through or being visible from the other