Since natural vanilla is very expensive, imitation vanilla is often used to mix with or completely replace natural vanilla. Imitation vanilla was produced from eugenol, which was itself produced by oil of [[clove]], but now it is made from sulfite waste liquors from the [[paper]] industry.<ref name="Reineccius" /> | Since natural vanilla is very expensive, imitation vanilla is often used to mix with or completely replace natural vanilla. Imitation vanilla was produced from eugenol, which was itself produced by oil of [[clove]], but now it is made from sulfite waste liquors from the [[paper]] industry.<ref name="Reineccius" /> |