After nearly 20 processes, a piece of natural cowhide has formed an advantageous leather fabric. In order to better understand this process, we will summarize it as follows:
1. Infiltration: Soak the leather in the drum to regain the water lost during the initial salinization.
2. Lime dipping: The first step of removing the fur and “bare” the leather.
3. Grease scraping: a mechanical step to remove residual fat under the skin to prevent chemical reactions and sour odor in the later leather.
4. Cut skin: Divide the epidermis into two or more layers. Only then can the upper layer become “full grain” leather.
5. Acid pickling: The chemical step of removing lime and opening the “grain” hole.
6. Tanning: Stop the organic decomposition process of the cortex to obtain chemical and biological stability.
7. Screening: Pick the best leather for Noah leather.
8. Shaving: Through the steps in the roller machine equipped with spiral blades, the thickness of the cortex is determined.
9. Retanning: Determine the final appearance of the leather: feel, texture, denseness, graininess.
10. Dyeing: Use dye to dye and apply evenly on the entire thickness.
11. Filling: Lubricates the leather layer to bring better elasticity, softness and resistance to pulling.
12. Drying: Eliminate humidity: Lay the skin on the preheating plate.
13. Air-drying: air-drying in a natural way to create the softness of leather.
14. Soften and moisten: soften and moisturize the fiber, further soften the leather’s feel.
15. Shrink: soften, moisturize and enhance the “touch” of leather.
16. Hand polishing: Improve the elegant and bright characteristics, which is called “thousand points” in the terms of tanned leather.
17. Pruning: Discard unusable parts.
18. Finishing: Determine the leather’s ability to resist friction, discoloration and stains.
19. Ironing and embossing: These two procedures are to make the “grain” leather more uniform.
20. Measurement: The cortex is measured by electronic means to determine the size.