This stretching process distinguishes parchment from leather. It can then be formed into a codex . To enable the scribe to write straight lines, the parchment is ruled by a combination of pin pricks and impressed lines. The scribe does not always write on the line, but often hangs the characters from the ruled line. The Vatican Library Exhibit has images of manuscripts on parchment.
Lime is mixed in which bites into all the raw skin.
This should fully clean it and remove the hairs. The circular frame on which the skin is stretched is made ready. Let it be placed in the sun so that the fluid is removed. Approach with the knife which tears away the flesh and hairs. It quickly renders the sheet thin.