Wine
the traditional, and cheaper way, to filter wine is with the following animal driven Ingredients:
- Gelatin (from boiled cow or pig body parts)
- Albumin (egg whites)
- Casein (animal milk protein) eggs or dairy milk.
therefore if used, it is not vegan. sometime it changes from year to year, which can be difficult to follow.
an example of a company that keeps their info up to date is "Sutter Home". and luckily they are inexpensive and widely available in the U.S.
today a lot of vineyards use an electric filtration systems.
a good resource to check changes is Barnivore at barnivore.com