The synthetically produced substance Polyvinylpolypyrrolidon (also Polyvidon or Povidon) is a powdery carbon compound with high Adsorption capacity
(Accumulation of gases or dissolved substances) compared to cloudy substances. It is one of the synthetic resins (see also under resins
). In the beverage industry, such as beer, it is used to remove cloudy substances. In winemaking, PVPP becomes beautiful
and stabilizing used. This binds and removes phenolic substances (tannins and dyes) and their oxidation products. It works much more specifically than protein-containing agents like gelatin
, Even with a noticeable reduction in tannins, the aroma is hardly or not attacked, but the wine becomes lighter and smoother. The wine's ability to oxidize is reduced, thereby stabilizing the color. PVPP is also used to combat wine defects Hochfärbigkeit
and horse sweat
used. By filtration
it can be largely removed again.