after Paul Le Caër informed the troops of the camp's existence. The planned destruction of the plant was prevented by resistance groups. After 1945 By the end of the 1940s, the total complex of social enterprises included a wood grinding mill, a pulp and paper mill and a rayon mill in Lenzing, a sawmill in Schörfling, and a hydroelectric power plant each in Lenzing and Pettighofen. The products were cellulose, paper, groundwood pulp, lumber and Glauber's salt (as a waste product). The number of employees at that time was over 2300 workers and salaried employees. In 1949, the Lenzing pulp and paper mill, which had been taken over in 1940, was restituted to the previous owners of this company before 1938 (the Bunzl-Konzern Holding AG, Zug/Switzerland), which in turn incorporated it into the restored Lenzinger Zellulose- und Papierfabrik AG. At the same time, the company name was changed back to the original form Zellwolle Lenzing AG. Appropriate agreements were made to take account of the many economic interconnections that continued to exist between the social and the separated production sites. In 1962, the company name was changed to Chemiefaser Lenzing Aktiengesellschaft in view of the planned start of production of synthetic fibers. At that time, the company's holdings included the rayon factory, a cellulose glass factory that had been put into operation in the fall of 1951, and its own power plant. In 1964, an agreement was concluded with Courtaulds Limited, London, providing for close cooperation in the field of research, processes and production for viscose fibers. In 1965, the construction of a plant for sulfuric acid production[11] was started at Lenzing, which went into operation at the end of the same year. In 1967, a plant was built for the production of synthetic films and tapes made of polyethylene and polypropylene for the packaging industry. In 1966, Austria Faserwerke GesmbH was founded jointly with Farbwerke Hoechst AG formerly Meister Lucius & Brüning, Frankfurt a. M. This company built a plant at Lenzing, which went into operation in 1967, for the production of polyester fibers with the brand name Trevira as well as converter and rupture cables made of polyethylene terephthalate according to a licensing process of Farbwerke Hoechst AG.[12] The company was also responsible for the production of polyethylene terephthalate. The old calcium bisulphite method was used for fiber production until 1963, when the new more eco-friendly magnesium bisulphite