Cachet Classic sketch books and sketch pads. All-purpose sketchbooks are great for drawing, writing, sketching, or doodling. Cachet sketch books are made of high quality, 70# neutral pH (acid-free), bright white paper. Ideal sketch pads for dry media such as ink, pencil, markers, or pastels. Tape-bound or spiral-bound for durability and covered in black embossed water-resistant cover stock. Cachet Classic sketch pads and sketch books are available in several popular sizes.