The fibers are finer than viscose rayon. Recommended care for regular viscose rayon is dry-cleaning only. In 2005 the production of viscose rayon was halted. Acetate shares many similarities with viscose rayon, and was formerly considered as the same textile. Grasim is the world's largest producer of viscose rayon fiber with about 24% market share. Sateri is a manufacturer of viscose rayon, while Bracell is a manufacturer of wood pulp. The material is commonly referred to in the industry as "viscose rayon". His Viscose Rayon samples were donated to the Science Museum, Kensington, in 1997. In 1974 Thai Rayon, the Group's Viscose Rayon Staple Fibre business was incorporated in Thailand. Viscose Rayon was first produced in Coventry England in 1905 by Courtaulds. The first commercial viscose rayon was produced by the UK company Courtaulds in 1905. The first commercial viscose rayon was produced by the UK company Courtaulds Fibres in 1905.