Semar is an international publishing concern specialising in high quality editions in humanities and social sciences and is the only publishing house in the world to use materials manufactured with conservation criteria that guarantee its publications both sustainability and an unprecedented durability. The cross-cultural editorial line of the house aims for a better understanding among people by a deeper knowledge of their mutual culture, ideas, traditions and beliefs in a dialogue intended to stimulate cultural diversity. All materials employed by Semar throughout the production cycle, besides complying with the ISO 9706 requirements on permanence of paper, take into account the whole production cycle of the book as integral part of an environmentally sustainable policy. Materials are selected and used according to an in-house patented procedure to confer a durability that ensures a gradual and homogeneous ageing process. Semar diversifies the use of materials according to the obsolescence of the product, while keeping clean production and zero waste as an aim in sight.