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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 or casein, 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.

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