What is the sediment and why you use in read wine?

It seems like you're asking about sediment in red wine, not "sediment and why you use." Sediment is not something we *add* to red wine; it's something that naturally forms in it.

Here's a breakdown:

What is Sediment?

Sediment in red wine is basically bits of solid matter that settle to the bottom of the bottle. It can include:

* Tannins: These are naturally occurring compounds in grapes that contribute to the wine's structure and astringency. As the wine ages, some tannins may precipitate out of solution and form sediment.

* Yeast: Yeast is used in the fermentation process and some remnants may remain in the wine.

* Grape skins and seeds: Small pieces of these may find their way into the wine during the crushing and fermentation process.

* Tartaric acid crystals: These crystals are a natural component of grapes and can precipitate out as the wine ages, forming a sediment that looks like tiny, sparkly shards.

Why is Sediment in Red Wine?

* Natural aging: As red wines age, they undergo chemical changes, and some of their components can form solid particles.

* Unfined/unfiltered wine: Some winemakers choose not to filter or fine their wines, which removes sediment. This allows the wine to express its natural character, including the sediment.

Should you drink the sediment?

Generally, it's best to avoid drinking the sediment. While it's generally harmless, it can make the wine taste bitter or earthy.

How to handle sediment:

* Decant the wine: Carefully pour the wine into a decanter, leaving the sediment behind.

* Use a wine filter: Some wine filters are designed to remove sediment.

* Let the wine sit: If you're not planning to drink the wine immediately, let it sit upright for a few days, allowing the sediment to settle at the bottom.

It's important to note that not all red wines develop sediment. The amount and type of sediment vary depending on the grape variety, the winemaking process, and the age of the wine.