Gransori obtained the ISO 9001:2008 quality management certification. The company has been granted quality certifications since 2003, hence achieving the professionalism and control required for top quality management, which is evidenced by the products and services offered to each client.

The approach hereby certified concentrates on the design, development, production, commercialization and technical service regarding forms and figures, with or without adhesive coating, made in polymers, textile fibers, cork and paper.