Medieval and early modern fraud-prevention technique - Deepstash
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Medieval and early modern fraud-prevention technique

Medieval and early modern fraud-prevention technique

Experts have identified the species of animals used for British legal documents dating from the 13th to 20th century, and have discovered they were almost always written on sheepskin, rather than goatskin or calfskin vellum.

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The fat content played a key role

The fat content played a key role

Sheepskin has a very high fat content, accounting for as much as 30 to 50 percent, compared to 3 to 10 percent in goatskin and just 2 to 3 percent in cattle. Consequently, the potential for scraping to detach these layers is considerably greater in sheepskin than those of other animals.

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And it continued for centuries

And it continued for centuries

The continuing use of sheepskin over goat or calfskin in later centuries was likely influenced by their greater availability and lower cost.

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Why?

Why?

Sheep deposit fat in-between the various layers of their skin. During parchment manufacture, the skin is submerged in lime, which draws out the fat leaving voids between the layers.

Attempts to scrape o...

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heisenberg

Digital marketing at dentsu. Invested in the symbiosis of marketing, psychology, and design. Photographer at heart.

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