How to Extract Tannins
by Ash Logan
Tannins are contained in plant polyphenols which can be found in many species of plants. Tannins are astringent, and cause the mouth to pucker if they are eaten – the best example of this is eating an unripened fruit. The reason they are used in tanning is that they bind to proteins, locking them in place, which causes them to stiffen.
Tannins are often extracted from wood, bark, nuts, and leaves due to their higher concentration,
however, tannins are also found in common beverages such as coffee, wine, tea, fruit juice, and in common foods like chocolate, fruits, legumes, and grains. Tannins are used in the process of tanning leather.
The contents of this zine are derived from a workshop delivered during Fibreshed Field School, by Dr. Love-Ese Chile, the Founder and Technical Director of circular waste research and testing company Regenerative Waste Labs. While this zine uses apple pomace as an example, it can be substituted by other plants or foods.