Tannin

Tannins are bitter-tasting chemical compounds that bind proteins. Tannins are present in the following:

Tannins are also used in the treatment of leather, to make it more durable. Natural tannins for this purpose come from oak trees, but synthetic tannins are more used.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.