natural pigment but there are still signs throughout the city that hark back to the glory days of the business. dates back to the time that has special significance to police c.e.o. . on this. one day billy kirby offered the city of toulouse a beautiful building like this because it was built by people who were selling pastel bloom during the renaissance period. they. that's purely we are effectively going back to the story of to lose because they were creating dies out of plants until the 19th century then petro chemicals arrived now we want to develop again a production made out of renewable materials just about all the material went over . so far the startup has produced several kilos of dye powder with the help of the bacteria but they will need to improve the process if they're to compete