J. Rettenmaier & Söhne GmbH + Co. KG manufacture and distribute cellulosic fiber products. Its products include apple and bamboo fibers, broken pellets, cellulose fibers, additives, powder, derivatives, compounds, flour, pellets, granules and compactate, croscarmellose sodium, colloidal systems, corn fluff, MCC-Pellets, natural fiber, oat fibre, psyllium, premix, raw fiber concentrates, soft wood fibers, wheat fibres and wood flour. The company was founded by Jakob Rettenmaier in 1878 and is headquartered in Rosenberg, Germany.