Page "Parchment" Paragraph 16
from
Wikipedia
The dehairing liquor was originally made of rotted, or fermented, vegetable matter, like beer or other liquors, but by the Middle Ages an unhairing bath included lime.
The liquor bath would have been in wooden or stone vats and the hides stirred with a long wooden pole to avoid human contact with the alkaline solution.
Sometimes the skins would stay in the unhairing bath for 8 or more days depending how concentrated and how warm the solution was kept — unhairing could take up to twice as long in winter.
However, if the skins were soaked in the liquor too long, they would be weakened and not able to stand the stretching required for parchment.
Page 1 of 1.
2.017 seconds.