Bundles-various ribs used to form or enhance the shape of the handbag. The side bones have coreless skin bones, leather cores with rubber cores, cotton cores, springs or steel wire cores, artificial material side bones and rubber bones without cladding.

Flat seam-refers to a process of connecting single-layer or multi-layer overlapping parts with a flat sewing machine (ie flat car), which is the most used process in leather sewing, suitable for all parts in the relative plane of leather products Processes such as joining or sewing decorative threads.

Inner seam-also called concealed seam or buried bag, is a traditional process where the edges of two parts are stuck together face to face after being sewn together and turned over, so that the seams of the parts can be seen but the stitches cannot be seen. There are early hand sewing and industrial sewing machine or high

Various methods of sewing the head car are suitable for the connection of internal and external parts and the production of soft handbags.

Open seam-also called outer seam, refers to the traditional process of sewing the inner layers of two connected parts relatively to each other so that the upper thread and the lower thread can be seen. There are also manual sewing and high-end sewing methods, which are suitable for the final sewing process of the mouth of the soft and shaped handbags and the three-dimensional structure of the horizontal head.

Bundled inner seam-is a decorative traditional process in which the edge of one part is sewn to the side bone and then attached to the edge of another related part for inner seam. It is suitable for the design of the middle structure of soft handbags or shaped handbags Make. Open seam of bundle edge-It is a decorative process made by inserting a decorative rib between the edges of two parts of oil edge or folding edge, which is suitable for the design and manufacture of various bag products.

Open seam-a decorative traditional process of wrapping a certain width of leather strips (or artificial leather strips, cloth strips, etc.) on the edge of a flat part or the contour of a three-dimensional structure. Single-sided hemmed hemming, double-sided hemmed hemming, and a variety of reverse hemming and nylon webbing inner hemming. The hemming of flat parts is sewn with a flat sewing machine, and the hemming of a three-dimensional structure is sewn with a high-end sewing machine, which is suitable for the design and manufacture of all leather products.

Oil edge-also known as loose mouth oil edge, after polishing the edges of leather product parts or the fitted three-dimensional contours, roll on a decorative traditional process of a layer of leather edge oil. The method of oil edge can be divided into two kinds of thick oil method with different processing technology and different processing technology and thin oil method with edge color improvement only. The thick oil method is suitable for the processing of relatively high-end leather products, requiring smooth and full edges; the thin oil method is universal for soft and hard leather, but its edges can see rough fibers and fitting gaps, which are mostly used in the processing of casual handbags.

Folding-shovel the edges of the product parts thinly or apply glue (or paste double-sided adhesive tape) directly to the edges of the lining and artificial materials, then fold the person into the inner layer for 2 minutes or 2.5 minutes (inch length unit 1) Minutes = 1/8 inch) is a traditional process, suitable for various artificial leather bag materials and genuine leather parts processing.

Semi-open seam——It is a fashionable process to sew the parts of different layers into a three-dimensional structure and then sew them with special column cars or shaking head cars. This process is suitable for sewing the bottom of the bag that cannot be turned over and the three-dimensional surrounding skin. It has the three-dimensional process effect of only seeing the surface line without seeing the bottom line. In addition, the sewing machine sews the parts on the same layer. After assembly, it only sees the upper thread and not the lower thread. The difference between them is that the sewing machine is suitable for plane sewing, and the column sewing machine and the shaking machine are suitable for three-dimensional sewing.

The above is an important process for the design and manufacture of leather goods. In addition, there are many other processes in the production and assembly process, which are also techniques that manual workers in various process flows must master. For designers, it only requires a certain degree of understanding of various processes in actual work, and can be used as a reference factor for product design. When the designer wants to make changes to some key processes, it is necessary to supplement the explanation and oral explanation with icons or words, emphasizing the special effects and methods of change after the process.