Process for the preparation of a complete extract of pilewort roots

摘要

The invention provides a process for the preparation of a complete extract of pilewort roots, used in cosmetological compositions, which consists of first subjecting the dried and ground roots to an extraction with 35 DEG -45 DEG C petroleum ether and then treating the insoluble powder by extraction with an aqueous lower alcohol. After having removed the insoluble impurities by filtration, the filtrate is treated with papaine and is concentrated to a solids content of 40 to 50%. Aqueous alcohol is then added to the concentrated extract and the deposit thus formed is removed by decantation when cold, leaving the desired extract.