Tanner

A Tanner is the person who tanns skinn into leather, making it usable for many appliances, from Armour to lines.

Tanning is the process of treating skins and hides of animals to produce leather. A tannery is the place where the skins are processed.
Tanning hide into leather involves a process which permanently alters the protein structure of skin, making it more durable and less susceptible to decomposition, and coloring.
Before tanning, the skins are dehaired, degreased, desalted and soaked in water over a period of six hours to two days.