These notebooks have been manufactured by one of the oldest Portuguese companies - Emilio Braga Stationers - since 1918. They are produced manually, without the use of industrial equipment. They are sewn and glued, with techniques that are over 100 years old. The interior paper can be of different types. They are normally smooth with 90 Grms paper on cream paper, especially for writing. It also has a card marked on one side and Checkered on the other, to serve as a writing guide, since all pages are blank. It can also be made on lined, smooth, and dot paper The spine is made of lined fabric to give it superior strength. All materials used are non-toxic and most materials are recycled and recyclable. All used paper comes from certified suppliers This model runs in several formats Each notebook has between 90 and 100 sheets of 90 grm.