Aluminum Sulfate Tanning Recipe
The method of alum tanning
The ancient tanning of leather, some of which are important in alum salt. The method of alum tanning is related to the quality of leather, making it tough and durable.
The agent used in alum tanning is mainly aluminum sulfate. Prepare a certain amount of water first, measure the amount of leather, and determine the amount of aluminum sulfate. Usually, for every square meter of leather, you need about three taels of aluminum sulfate. Slowly dissolve the aluminum sulfate into water, stir well, so that it is completely dissolved and becomes a clear liquid.
Take the raw skin, immerse it in water first, remove its dirt and blood stains, about an hour, until the skin is soft and moist. Drain the water and put the skin in the aluminum sulfate solution. This liquid needs to be stirred often, so that the skin is soaked evenly. The soaking time varies depending on the thickness of the skin. The thin skin is soaked for three days, and the thick skin may take five days. During this period, it is appropriate to observe the color of the skin and gradually turn yellowish.
After soaking, take out the skin and drain the solution. Rinse with water several times to remove the excess alum to prevent the alum from eroding the skin surface. Then, put the skin in a ventilated place to dry, do not let the sun shine directly, and prevent the skin from drying and cracking. When the skin is semi-dry, knead it lightly with your hands to make it soft. After kneading, the skin will be as flexible as cotton, and the tanning will be successful.
Such alum-tanned leather can be used in the genus of clothing armor, boots, and pouches. It is durable and not damaged for a long time. It is widely used.
The ancient tanning of leather, some of which are important in alum salt. The method of alum tanning is related to the quality of leather, making it tough and durable.
The agent used in alum tanning is mainly aluminum sulfate. Prepare a certain amount of water first, measure the amount of leather, and determine the amount of aluminum sulfate. Usually, for every square meter of leather, you need about three taels of aluminum sulfate. Slowly dissolve the aluminum sulfate into water, stir well, so that it is completely dissolved and becomes a clear liquid.
Take the raw skin, immerse it in water first, remove its dirt and blood stains, about an hour, until the skin is soft and moist. Drain the water and put the skin in the aluminum sulfate solution. This liquid needs to be stirred often, so that the skin is soaked evenly. The soaking time varies depending on the thickness of the skin. The thin skin is soaked for three days, and the thick skin may take five days. During this period, it is appropriate to observe the color of the skin and gradually turn yellowish.
After soaking, take out the skin and drain the solution. Rinse with water several times to remove the excess alum to prevent the alum from eroding the skin surface. Then, put the skin in a ventilated place to dry, do not let the sun shine directly, and prevent the skin from drying and cracking. When the skin is semi-dry, knead it lightly with your hands to make it soft. After kneading, the skin will be as flexible as cotton, and the tanning will be successful.
Such alum-tanned leather can be used in the genus of clothing armor, boots, and pouches. It is durable and not damaged for a long time. It is widely used.

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