Further patents were granted for the synthesis of methylene blue and eosin, and in 1880, research began to try to find a synthetic process for indigo dye, though this was not successfully brought to the market until 1897. In 1901, some 80% of the BASF production was dyestuffs.
Further patents were granted for the synthesis of methylen:e blue and eosin, and in 1880, res!earch began to try to find a synthetic pro.cess for indigo dye, though this was not successfully brought to the market until 1897. In 1901, some 80% of the BASF production w,as dyestuffs.