Traditionally all leather in England was oak bark tanned because of the ready supply of oak, with a tannery in every village and a ready supply of local cattle. In France and Italy it was chestnut bark tanning because that was the local wood.
The tour of Baker's with Andrew Parr begins.
|Ground oak bark|
|The oak bark liquor ready to be used in the tanning pits|
Oak bark liquor pits
When the tan is strong enough it is pumped up to the tanning pits.
Today, Baker's hides are still locally sourced from the South West of England, in particular Devon.
|Stacked, salted hides|
The hides are first salted to preserve them and then de-haired in lime pits. Soaking in the lime loosens the hair and removes fatty deposits from the underside of the hides.
|Walking up to the raised lime pits|
|The lime process with 60 skins in each pit.|
|The lime pits remove the hair and fatty deposits from the surface|
leaving it smooth and clean
Once de-haired the hides are called pelts. The pelts then go from the lime pits to the beam house - where any remaining hair is removed and the lime is washed out from the pelts, so that the surfaces are clean - and finally to the tan yard.
|Washing down the tanned hides|
There are 72 pits in the tannery with the strength of liquid increasing in strength from the bottom to the top.
|The tanning pits with oak bark liquor of different strengths.|
New pelts are put into the weakest tanning liquid and each week are moved on to the next strongest pit. They are hung on wooden sticks so that they tan evenly all of the way around.
After three months they are taken off the sticks and are laid flat in pits with oak bark chippings in between each layer. They are kept in the pits for a further nine months, so the entire tanning process takes 12 months.
The pelts are then taken out of the pits and drained for a couple of days, before going through to the finishing room. They are now leather.
|The finished bends sorted by thickness and stacked ready to go out|
Oak bark tanning is a slow process, but the benefits are its tensile strength, durability and the fact that it is lightweight. It is used primarily in leather goods, saddlery and, of course, high end footwear.
Once the tanning is completed the leather is finished and dressed depending on its final use. The welt leather is dressed to improve its waterproofing and saddlery leathers are dyed and dressed to add colour and waterproofing.
|An old but very much used roller - wide enough to take large bends|
|The tanning pit ropes strengthened and preserved through the tanning process|
That's the tanning process in a nutshell, but take a look at Baker's own film below for the full story.
Until next week happy shoe making!