Absinthe "the holy trinity." Many other herbs may be used as well, such as petite wormwood ("Artemisia pontica" or Roman wormwood), hyssop, melissa, star anise, angelica, peppermint, coriander, and veronica. Adding to absinthe's negative reputation in the late 19th and early 20th centuries, unscrupulous makers of the drink omitted the traditional colouring phase of production in favour of adding toxic copper salts to artificially induce a green tint. This practice may be responsible for some of the alleged toxicity historically associated with this beverage. Many modern day producers resort to similar (but non-deadly) shortcuts, including the use of artificial food colouring
Chartreuse (liqueur) processes and the same secret formula as the traditional liqueur, and by extra long aging in oak casks it reaches an exceptional quality. Chartreuse VEP comes in both yellow and green. Élixir Végétal de la Grande-Chartreuse (138 proof or 69% – also 142 proof or 71%) has the same base of about 130 medicinal and aromatic plants and flowers but is more alcoholic. It can be described as a cordial or a liqueur, and is claimed to be a tonic. Sold in small wood-covered bottles. Liqueur du 9° Centenaire (47%) was created in 1984 to commemorate the 900 year anniversary