Talk:Bark mill

External links modified
Hello fellow Wikipedians,

I have just modified 2 one external links on Bark mill. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
 * Added archive https://web.archive.org/web/20110903214837/http://www.amblesidesheepskins.co.uk/section.php?xSec=42&xPage=1 to http://www.amblesidesheepskins.co.uk/section.php?xSec=42&xPage=1
 * Added archive https://web.archive.org/web/20110522222854/http://www.bampton.org.uk/mill.html to http://www.bampton.org.uk/mill.html

When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at ).

Cheers.— InternetArchiveBot  (Report bug) 09:50, 27 October 2016 (UTC)

Removed tanning section
Hi, I removed the below section (as it does not relate to the mills, they merely ground the bark), pasted here in case someone would like to integrate any new information from it into Tanning (leather). NiGoosefort (talk) 11:03, 24 April 2017 (UTC)

Bark or vegetable tanning
Bark tanning or vegetable tanning is part of the ancient process of creating durable, water repellent leather with a lot of 'body'. It can be done to most types of skin, but it is usually reserved for tanning leathers from large and thick hides such as cattle, horses, and pigs. The leather produced has been commonly used for saddles, canteens, stiff shoes, belts, wallets, holsters, harnesses, helmets, pouches, trunks, shields and gun cases. It was also used as an integral part of bellows, hinges, wagon wheels, etc. Vegetable tanned hide is flexible and is used for luggage and furniture.

Mineral tanning
Mineral tanning, being cheaper and faster, replaced the use of bark and mainly uses Chromium sulphate. Once the desired level of penetration of chrome into the substance is achieved, the pH of the material is raised again to facilitate the process. In the raw state, chrome tanned skins are blue. Chrome tanning produces a stretchable leather which is excellent for use in handbags and garments.

Tawing uses alum and aluminium salts, together with egg yolk, flour, and other salts. The leather becomes 'tawed' by soaking in a warm potash alum and salts solution. The process increases the pliability, stretchability, softness, and quality of the leather. The addition of egg yolk and flour to the standard soaking solution further enhances its fine handling characteristics. Then, the leather is air dried for several weeks, which allows it to stabilize. Tawing is used on pigskins and goatskins to create the whitest colour.