Sammying in Leather Processing: Removing Excess Water for Better New Genuine Leather Quality
, retanning, dyeing, drying, and finishing. Without proper sammying, leather can remain too wet, uneven, difficult to handle, and harder to process.
At newgenuneleather.com, we believe that premium leather quality depends on every stage of production. Sammying may look like a simple water-removal step, but it plays an important role in creating smooth, even, and high-quality leather.
What Is Sammying in New Genuine Leather Processing?
Sammying is the process of mechanically removing excess water from wet leather after tanning. The leather is passed through a sammying machine, where rollers apply controlled pressure and squeeze out extra moisture.
This process does not completely dry the leather. Instead, it reduces the water content to a suitable level so the leather can be handled and processed more easily.
In simple words, sammying is like controlled squeezing. It removes extra water without damaging the leather fibers.
Why Is Sammying Needed?
1. Removes Excess Water
After tanning, leather holds a large amount of water inside its fiber structure. If this water is not removed, the leather becomes heavy, unstable, and difficult to process.
Sammying removes excess water and brings the leather to a more manageable moisture level.
2. Makes Leather Easier to Handle
Wet leather is heavy and slippery. It can be difficult to move, stack, split, shave, or process in later stages. Sammying reduces water content and makes the leather easier for workers and machines to handle.
This improves processing efficiency and helps maintain better leather control.
3. Prepares Leather for Splitting and Shaving
After tanning, leather often needs to be adjusted for thickness. Splitting and shaving require leather to have a suitable moisture level. If the leather is too wet, thickness control becomes difficult. If it is too dry, the fibers may become stressed.
Sammying helps prepare leather for more accurate splitting and shaving.
4. Improves Thickness Uniformity
Excess water can make leather uneven and swollen. Sammying helps reduce this swelling and allows the leather structure to settle more evenly.
This supports better thickness control and improves the final uniformity of the leather.
5. Supports Better Drying and Finishing
If leather goes directly to drying with too much water, drying may take longer and become uneven. Sammying reduces the moisture load before drying, helping the leather dry more evenly and efficiently.
Better drying also supports smoother finishing, better surface quality, and improved final appearance.
How Is the Sammying Process Done?
In modern leather production, sammying is usually done with a sammying machine. The wet leather is fed between rollers covered with felt or special absorbent materials. As the leather passes through, pressure removes water from the hide.
The pressure must be carefully controlled. Too little pressure may leave too much water inside the leather. Too much pressure may damage the grain, mark the surface, or affect the leather structure.
Skilled operators adjust the machine according to the leather type, thickness, tanning method, and final product requirements.
When Does Sammying Take Place?
Sammying usually takes place after tanning and before mechanical thickness adjustment steps such as splitting and shaving. In some production systems, sammying may also be used after dyeing or retanning to remove extra water before drying.
The exact timing depends on the tannery workflow and the type of leather being produced. However, the main purpose remains the same: to remove excess water and prepare the leather for the next stage.
What Happens After Sammying?
After sammying, the leather may go through several important steps:
Splitting: Divides the leather into required thickness layers.
Shaving: Makes thickness more even and uniform.
Neutralization: Balances the leather condition for further chemical treatment.
Retanning: Improves fullness, softness, firmness, and final character.
Dyeing: Adds the required color.
Fatliquoring: Adds softness and flexibility.
Drying: Removes moisture under controlled conditions.
Finishing: Adds final surface protection, shine, texture, and appearance.
Sammying helps make these stages more controlled and effective.
What Happens If Sammying Is Not Done Properly?
Poor sammying can cause several problems in leather production. If too much water remains, leather may become difficult to split, shave, dry, or finish. It may also dry unevenly, develop wrinkles, or show inconsistent surface quality.
If too much pressure is applied, the leather grain may be damaged, marked, or flattened. This can reduce the final appearance and value of the leather.
A good sammying process must remove enough water while protecting the natural grain and fiber structure of the leather.
Sammying and Premium Leather Quality
Premium leather requires controlled moisture, uniform thickness, smooth texture, and clean finishing. Sammying supports all of these qualities by preparing the leather for later mechanical and finishing processes.
When sammying is done correctly, leather becomes easier to handle, more uniform, and better prepared for high-quality finishing. This helps create leather that looks refined, feels smooth, and performs well in finished products.
At newgenuneleather.com, we understand that even the hidden technical steps matter. Sammying is one of the important post-tanning stages that helps transform wet tanned leather into a premium finished material.
Conclusion
Sammying is an essential post-tanning process in leather production. It removes excess water, improves handling, prepares leather for splitting and shaving, supports uniform drying, and helps create smoother final leather.
Although it may seem like a simple mechanical step, sammying has a major effect on leather quality, processing efficiency, and final appearance.
At newgenuneleather.com, premium leather begins with expert processing, and sammying is one of the key steps that helps produce strong, smooth, and high-quality leather.
