The Manuscript Codex * Materials
TANNED SKIN

The skin of an animal is cleaned, scraped and de-haired and then soaked in a series of solutions, some of which contain tannin. Historically a variety of vegetal materials were used as tannin sources. During the tanning process, the protein molecules in the leather become more durable and resistant to microbiological attack and turn a brown color.
 
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AUTHORS: PAUL HEPWORTH AND KARIN SCHEPER