Hair Tanned Leather
Hair Tanned Leather
The Art to make Leather from Raw
Many consumers own a variety of leather products, ranging from belts to jackets, and the resourceful material has been used for thousands of years in a variety of products. The process for making leather includes a complex set of steps from skin to finished product. These steps are often referred to as “tanning†due to the most typical part of the process, which uses the tannic acids present in plant matter to chemically modify the leather so that it will not decompose or rot.
If used without any treatment, animal hides would quickly break down and begin to stink. For this reason, the hide needs to be treated to form leather. The process can be broken down into two
basic stages: wet blue processing and finishing, both of which are adept in large commercial spaces known as tanneries. While it is possible to make leather at home, it is an aromatic and complicated process, and most people prefer to send out their hides for tanning.
Skin has three layers beginning with the epidermis, proceeding to the derma, and ending in the adipose, which is also known as flesh. When making leather, only the strong and flexible derma, which is a layer of collagen fibers, is preferred. The collagen is exuded by cells, and forms a network of useful strings. When leather is processed, these fibers are retained while everything else is stripped away.
First, the skin is fleshed, the flesh being cleaned off of the hide, and the surplus adipose, or animal fat, is removed. Then the hides are washed and soaked, which regain moisture to dried hides while loosening blood and dirt. Chemicals are added to turn the water alkaline, which will eat away at the hair and epidermis. The collagen fibers begin to swell, while excess proteins rushed out.
When this process is complete, the water is brought to a stable pH and the swelling goes down, so that enzymatic cleaners can be added to remove any remaining organic waste. Then the hide is pickled in a highly acidic solution, which prepares it for tanning. Tanning agents form bonds with the collagen in the hide, causing it to resist bacterial attack, and the hides are removed from the wet blue processing tank for finishing, after being run through rollers to remove excess water.
When the hides emerge from the wet blue stage, they are split to the preferred thickness. Depending on the planned use of the leather, this thickness may vary. Then the leather is re-tanned, with different materials depending on whether it needs to be firm or soft, and dyed. After dyeing, the leather is oiled so that it will remain flexible and soft. Then the leather is dried, mechanically treated to soften it, and buffed so that it will have a smooth and attractive surface. Some leathers are marked with patterns before the final stage, which is the function of a finishing coat of polymer or wax to protect the surface of the leather.
Leather treatment used to be a highly polluting industry, but tanneries responded to public protest about odor and pollution issues. Tanneries now recycle the liquids used in the leather making process and desist from chemical dumping. Tanning still carries a strong stink, but is no longer accompanied by environmentally unfriendly business practices in most parts of the world.
About the Author
FAPORT International was established in 2001 with the head office in Sialkot-Pakistan backed by two European and one North American office including Germany, UK and USA respectively.
The vision was to start with an aim to serve in the manufacturing and export of premium quality Leather Garments & Accessories, Cordura Garments, Gloves Sexy Leather Garments, etc,
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