Oakmoss Evernia prunastri is used as a fixative agent in Eau de Cologne within the perfume industry. It is green on top and white on bottom, and divides evenly into "forks"; it becomes very soft when wet.
In the perfume industry, Evernia prunastri oakmoss serves as a fixative agent in Eau de Cologne. This moss is green at the top and white at the bottom, splitting into even "forks," and it softens significantly when exposed to moisture.