From 1957 to 1965 there was a further decrease in the price of wolfram which resulted in a reduction of production in order to control cost. During this period the company increased the production of tin to compensate the low wolfram prices. In 1966, there was a positive evolution that peaked in 1970 and this corresponded to a period of expansion. However, soon afterwards prices suddenly dropped again. During this period the production was stockpiled instead of selling below the production price, but due to the financial expenses it was decided to increase the capital with the entry of new Shareholders.