Loose Grain: Sheepskin
Sheep skins are high in natural fat content. They are relatively easier to make soft. With this soft property comes double layer or loose grain. The use of bating agent is one of the main contributing factor to double layer or loose grain. If used over an appropriate dosage or drumming duration, bating agents can further disintegrate and weaken the fiber until the skin has double layer or loose grain.
Sheep skins are high in natural fat content. They are relatively easier to make soft. With this soft property comes double layer or loose grain. The use of bating agent is one of the main contributing factor to double layer or loose grain. If used over an appropriate dosage or drumming duration, bating agents can further disintegrate and weaken the fiber until the skin has double layer or loose grain.
Phosphonol PVGThey will not destroy the fiber structure but only softening and lubricating the fiber. Skins will stretch and have good tensile strengths. You can use them by decreasing the bating agent dosage and increasing Phosphonol PEK and Phosphonol PVG dosage in the pickle stage. 1-4% on pelt weight is a recommended dosage.
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Phosphonol PEKThey will not destroy the fiber structure but only softening and lubricating the fiber. Skins will stretch and have good tensile strengths. You can use them by decreasing the bating agent dosage and increasing Phosphonol PEK and Phosphonol PVG dosage in the pickle stage. 1-4% on pelt weight is a recommended dosage.
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Phosphonol MAAOnce the tanning stage is completed, age the wetblue for at least 14 days and proceed to the retanning stage. Selection of fatliquors in the tanning stage is also an important factor to avoid loose grain problem. Eurekanol 6SKT, Silikanol XMN and Phosphonol MAA are recommended for fatliquoring stage because they will soften but not loosen the leather.
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