Bentonite is a natural mineral traditionally used as a fining agent for all types of wines, including red, white, and rosé. This process is essential for improving clarity and, above all, protein stability. Due to its negative charge, bentonite attracts and binds positively charged compounds, such as unstable proteins in wine, which can cause turbidity or unwanted precipitations.
Enological fining agents like bentonite ensure the stability and clarity of wine by preventing the formation of unwanted compounds and removing excess proteins through precipitation and subsequent elimination. This makes bentonite an essential fining agent in the winemaking process.
The use of fining agents like bentonite is also permitted in organic winemaking, allowing high-quality wines to be made without compromising the principles of organic production. Due to its effectiveness, bentonite continues to be a popular choice among wine fining agents to improve the quality and stability of the final product.