Fuente: WIPO "olive oil" The present invention relates to an oil-extracted product of indigo naturalis which is obtainable by a process comprising:
extracting indigo naturalis powder with olive oil under heating at a temperature ranging from 100°C to 155°C and at a ratio of indigo naturalis to olive oil in a range of from 1:10 (w/v) to 1:40 (w/v);
followed by a refining treatment by filtration.