Inner lining of the terracotta jars: different choices, different objectives
2015/03/14 beeswax / epoxy coating / Francesco Bartoletti / inner lining / oenologist / terracotta jars / thermal insulation
Depending on the individual requirements of each wine producer, terracotta jars can be coated inside or left “Al naturale” with no lining at all. Artenova has delegated this subject to expert oenologist Francesco Bartoletti, a member of winemaking association “Gruppo Matura” and technical consultant of their company:
“Terracotta, unlike wood does not confer aromas to wine – explains Bartoletti – It has an extraordinary capacity for thermal insulation which enables wine to be kept in optimal conditions. The inner lining of the terracotta jars can be decided according to the end results desired. The use of terracotta without any coating allows an intense oxygenation of the wine matured in the jar. With the use of an inner lining such as beeswax part of the gaseous exchange with the outside is reduced, and to further limit it to a bare minimum the inside of the jar can be coated with epoxy resin “.
In short the three choices, and the three different objectives:
1) Jar without lining
Allows maximum permeability of oxygen favouring the maturation of wine, polymerisation and the condensation of tannins and anthocyanins in red wines. Absolutely recommended for all varieties of grape whose resulting wines tend to reduce during aging and which need a good supply of oxygen in order to better express their characteristics.
2) Jar lined with beeswax
Limits the permeability of oxygen thus protecting the wine during aging and enables the jar to be buried in the ground without risk of seepage. Moreover, coating the jar with wax allows more effective cleaning after use.
3) Jar with epoxy coating
Allows the perfect hygiene of the jar before and after use. Greatly limits the passage of oxygen and allows the better management of wines which need a reduction favouring environment. Also ideal for storing wines whose maturation process is finished while they are waiting to be bottled.