Acetone-soluble CDA was discovered 100 years ago as a new attractive member of the cellulose derivatives family. Immediate economical expectations had been very high, but it required considerable time and efforts until CDA was applied in bigger volumes in the markets of lacquers, plastics, textiles, films, membranes, Filter Tow and others. The success was often linked to basic pioneer developments of appropriate technologies such as dry spinning, injection moulding, film casting, blocks and sheets technologies. An overlook on the historical evolution of the market volumes of this modified natural polymer reflects the ups and downs in the different application fields, and in some areas the substitution by other fully synthetic polymers. Currently CDA consumption is growing in the areas of film for polarizers in LCD-displays and Filter Tow. About 80% of the Cellulose Diacetate Capacity is today used for cigarette filters, where its unique profile of properties offers a series of advantages: CDA selectively removes undesired smoke components and provides a desired "taste signature". The conversion of Filter Tow into Filters allows high speeds and individually designed Filters with a pressure drop within closely prescribed limits.