Bentonite is a common additive used to clarify and fine wines. It’s great for removing protein haze and can be used to remove off aromas. But what is it?
What is Bentonite?
Bentonite is an impure clay formed by the weathering of volcanic ash. It is an absorbent material that is able to bond with the floating particles that cause cloudiness in wine.
The main types used to fine wine are sodium and calcium bentonite. While each will contain small amounts of other minerals they are described by the mineral that is in greatest concentration.
