Chillfilter

Chillfilter is a term that refers to a specific type of filtration process used primarily in the beverage industry, particularly for wine and beer. The primary purpose of chill filtration is to remove tartrates, which are crystalline precipitates that can form in beverages, especially at low temperatures. These tartrate crystals are harmless and do not affect the taste or quality of the beverage, but their appearance can be perceived negatively by consumers, leading to a belief that the product is unstable or flawed.

The process involves cooling the beverage to a very low temperature, often just above its freezing point, and then passing it through a filter with a small pore size. This low temperature causes any tartrates present to precipitate out, making them easier to capture by the filter. While effective at removing visible tartrates, some argue that chill filtration can also remove desirable flavor compounds or alter the texture of the beverage. This has led to a debate within the industry and among consumers about the necessity and impact of the process. Some producers opt for a "non-chill filtered" approach, embracing the potential for tartrate formation as an indicator of a less processed, more natural product. The decision to chill filter or not often depends on the producer's philosophy, target market, and desired product characteristics.