Tanning (leather)

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/tanning-leather

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the chemical stabilization mechanism?Cross-linking of collagen fibers to prevent putrefaction and shrinkage
2. What is the vegetable tanning agent?Tannins (polyphenolic compounds) from plant sources
3. What is leather tanning and why do we do it?Leather tanning is a chemical process that stops animal hides from rotting, turning them into strong, flexible leather. It keeps the collagen fibers stable so the leather can be used for shoes, bags, and more.
4. How does vegetable tanning work?Vegetable tanning uses natural plant substances called tannins from bark, leaves, or galls. These tannins bind to the collagen fibers, giving the leather a special color and smell, but it takes months to finish.

Collagen: The primary structural protein in animal connective tissues, forming the basis of leather.
Denaturation: A process that alters the natural structure of proteins, making them more stable.
Cross-linking: The formation of chemical bonds between protein molecules to create a more stable structure.