These notebooks have been manufactured by one of the oldest Portuguese companies - Papelarias Emilio Braga - since 1918. They are produced manually, without the use of industrial equipment. They are sewn and glued using techniques over 100 years old. The interior of the page can be of different types. They are usually plain with 90 gsm cream paper, special for writing. It also has a card ruled on one side and squared on the other, to serve as a writing guide, since all pages are blank. It can also be made in ruled, plain, or dotted paper. The spine and corners are fabric-covered to provide greater durability. All materials used are non-toxic, and most materials are recycled and recyclable. All the paper used comes from certified suppliers. This model is available in various formats.