Tanning

  • Tanning leather and hides in Tanneries was an important part of the economy in the Ancient World.
  • They were located outside of towns or in poor suburbs of cities because of the powerful smells that they produced. A Tannery has been identified and excavated in Pompeii.

Preparation

  • Skinning
    • Removal of the animal hide from the carcass.
  • Curing
    • After skinning, the Hide was either immersed in a salt bath to kill off any remaining bacteria, or dry packed in salt blocks for four weeks to remove excess moisture.
  • Soaking
    • The skin would be immersed in Urine which helped remove the animal hair. There was even a Urine Tax imposed by Vespasian on this industry.
  • Liming
    • Liming releases the hair, grease, fats and other matter and prepares the collagen
  • Unhairing
    • Unhairing the loosened material was then done by a metal hand scraper.
  • Deliming
    • Deliming reduces the acidity of the collagen by soaking in enzymes or dung-water to produce a bacterial fermentation. This softens the hide.
  • Pickling
    • The acidity of the collagen is then reduced by being treated with salt.

The Main Methods of Tanning

  • Vegetable Tanning
    • Produces a leather which is not water resistant, and is liable to rot if allowed to become moist. It could be waterproofed by oiling.
  • Tawing or Alum Tanning
    • Produces a type of leather that is water resistant, and could be used in army clothing.
    • The leather is soaked in a solution of potash alum and salts.
  • Rawhide
    • This was untanned leather with all the hair and flesh removed, then dried out and ‘worked’ into the required shape. It could be waterproofed by oiling.

Applications of Leather

  • Leather was sometimes used as an alternative to currency.
  • Sandals and Shoes: The Soles of shoes were made from the thickest and toughest leather.
  • Clothing
  • Belts
  • Gloves
  • Waterskins
  • Handbags
  • Boats
  • Writing Material, such as Vellum or Parchment
  • Strabo wrote that the Phoenicians made leather into water pipes.

Applications by the Roman Army

  • Shields
  • Horse Harnesses
  • Horse Saddles
  • Heavy leather coats, for marching and on the northern frontiers.
  • Armour
  • Quivers
  • Scabbards
  • Boots
  • Sandals

Animal skins used to make Leather

  • Cattleskin mainly.
  • Sheepskin.
  • Pigskin.
  • Goatskin was rarely used.

Roman Tannery

  • A Tannery was excavated in Pompeii complete with all the Tanning Tools.

 

Posted in .