The distillation process is carried out using steel stills. Tequila is distilled twice, the first distillation is called "tearing", which requires only a couple of hours and produces the liquid better known as "ordinary", which has an alcoholic graduation of approximately 20% alc./vol. Subsequently the second distillation, also known as "rectification", is carried out, and it lasts between three and four hours. Through this distillation it is possible to increase the alcohol content up to 55% alc./ vol. The transparent liquid obtained from the second distillation can be considered as Silver Tequila already, and it can also be subject to maturation in order to become one of the other types of Tequila, such as Reposado, Añejo or Extra Añejo.