News
Social News
Industry News
Company News
News

Why goatskin is better against other animal leather products?

Leather is made out of any animal skin which gets chemically or mechanically processed. Genuine leather breathes and it has capabilities to absorb hum...

Introduction of Sun Team (Chapter 1: The Introduction of Wuhan Sales Office in China)

Chapter 1 The Introduction of Wuhan Sales Office in China (Rooster's Belly) Chapter 2 The Introduction of Technology and Management Department in Ital...

6 knowledge about the wallet -2

Large zip wallet can hold mobile phone Yes, we have to admit that mobile payment is very convenient. In the era of mobile phones, we also need a walle...

The introduction of Ching Ming Festival

Time: solar term qingming day Gregorian calendar (the Gregorian calendar) around April 5 Interpretation Ching Ming Festival is China's most important ...

The Four Forms of Leather

In general, leather is sold in these four forms: Full-grain leather refers to hides that have not been sanded, buffed, or snuffed (as opposed to top-g...

Sunteam 2019 Japan exhibition in April

Japan Tokyo exhibition coming again in April 2019 and today is last day. Our Sunteam&...

The tape of handbags

1,Casual bag is used with a combination of casual wear : divided into handbags, shoulder bags, bags, backpacks and cable packages and other types, wit...

What is Leather?

What is Leather? The British Standard Definition of leather is: 'Hide or skin with its original fibrous structure more or less intact, tanned to be im...

China, France plan to launch first joint oceanic satellite in 2018

The first satellite jointly developed by the Chinese and French space agencies will be launched from China in the second half of 2018. The China-Frenc...

Handbags & Purses Market Research Reports & Industry Analysis

Handbags and purses are essentially bags that come in a variety of sizes and are a product of certain fashion designs. Those employed within this indu...
Certifications
Contact Us
Hotline: 86 27-85570058
Email: admin@wuhansunteam.com
Address:Rm#2508,building#1,fanhai international Soho Town,Huaihai road,Jianghan district,wuhan,china .
Contact Now
Home > News > Social News > Leather Production process

Leather Production process

Lily www.walletwmazon.com 2017-06-14 10:18:14
The leather manufacturing process is divided into three fundamental subprocesses: preparatory stages, tanning, and crusting. All true leathers undergo these subprocesses. A further subprocess, surface coating, can be added into the leather process sequence, but not all leathers receive surface treatment. Since many types of leather exist, it is difficult to create a list of operations that all leathers must undergo.

The preparatory stages are when the hide/skin is prepared for tanning. Preparatory stages may include: preservation, soaking, liming, unhairing, fleshing, splitting, reliming, deliming, bating, degreasing, frizing, bleaching, pickling, and depickling.

Tanning is a process that stabilizes the protein of the raw hide or skin so it does not putrefy, making it suitable for a wide variety of end applications. The principal difference between raw and tanned hides is that raw hides dry out to form a hard, inflexible material that, when rewetted (or wetted-back) putrefy, while tanned material dries to a flexible form that does not become putrid when wetted-back.

Many tanning methods and materials exist. The choice ultimately depends on the end application for the leather. The most common tanning material is chromium, which leaves the tanned leather a pale blue color (due to the chromium). This product is commonly called wet blue. The hides, when finished pickling, are typically between pH 2.8 and 3.2.[citation needed] At this point, tannery workers load the hides into a drum and immerse them in a float that contains the tanning liquor. The hides soak while the drum slowly rotates about its axis, and the tanning liquor slowly penetrates through the full thickness of the hide. Workers periodically cut a cross-section of a hide and observe the degree of penetration. Once the process achieves even penetration, workers slowly raise the float's pH in a process called basification, which fixes the tanning material to the leather—and the more tanning material fixed, the higher the leather's hydrothermal stability and shrinkage temperature resistance. Chrome-tanned leather pH is typically between pH 3.8 and 4.2.


Tel:86 2785570058
Email:sunteam05@wuhansunteam.com
Website:www.leathergoods-manufacturers.com