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Sunblaze tanning portland1/28/2024 ![]() The main difference between tanned and untanned dry hides is that untanned hides will putrefy after getting wet, while tanned leather will not. Tanning also changes the appearance of the hide. The change depends on how long it takes and the tanning agents used. Tanning of hides for leather has been done for thousands of years by ancient civilizations like those in Sumer and India. Preparation For TanningĪnimal hides go through several stages before they are ready for use in making products like belts, wallets, shoes, furniture and clothing. The stages before tanning may include fleshing, preservation or curing, soaking, liming, unhairing, splitting, deliming, bating, degreasing, bleaching, pickling, and depickling. Once the hides arrive from the slaughterhouse or farm, the next step is to remove any scraps of flesh from them. The next step is to cure the hides with salt. It greatly reduces the moisture content of the hide.Ĭuring prevents putrefaction by preventing bacterial growth on the hide between procurement and processing. One way to cure the skins is by wet-salting, in which the hide is heavily salted and then pressed into packs for up to 30 days. Another way is to soak them in a saltwater brine for about 16 hours. The steps after curing are called Beamhouse operations. The first step is to remove the salts left over from the curing in a process called soaking. This process involves soaking the skins in water which has certain chemicals added to prevent bacterial and fungal growth.Īfter soaking, the hides and skins go for liming. This means soaking the hides in a drum or pit filled with milk of lime, an alkaline solution.
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