According to the clothing number series to produce samples for multi-layer cutting. It is the main form of cutting in the industrial production of clothing. The main steps are: ① material inspection. Mainly on the clothing material expansion rate, color fastness, heat resistance of the physical and chemical testing, checking defects, measuring width, finishing the weft and heat pre-shrinkage and so on. ② Development of specifications and samples. According to clothing styles, specifications, material properties and sewing process requirements, made of cardboard with a sample of the sample piece of clothing, and develop specifications with. (iii) Arrangement of materials. Arrange the sample of each piece of clothing on the material or the same width of the material on the paper, in order to maximize the utilization rate of the material. (4) Drawing. According to the format determined by the row material, according to the sample plate draw the outline of the garment piece and mark. Large quantities of products are usually used to leak pattern plate (the row of material lines drilled into the sample of equally spaced continuous pinholes), to brush the sample (with powder brushed into the holes so that it leaks down the shape) instead of scratching the sample. 1960s appeared for the design of the computer-aided design system (CAD) for apparel design, according to the actual sample or the proportion of the new technology to draw the drawing of the row of material. ⑤Playing. According to the length, width and quantity required by the row material sample, the material will be layered on the cutting table. 50's in addition to manual laying, the use of carts or round-trip electric laying machine operation. 80's the application of microcomputer-controlled automatic laying machine, can be automatically positive, negative cross or one-sided laying, automatic trimming, marking and so on. (6) Cutting. According to the pattern line will be cut into pieces of clothing. Usually use vertical electric scissors (see Daily Hardware), the highest cutting thickness of up to 160mm, about 200 layers of thin fabric. In addition, there are a variety of auxiliary cutting equipment, such as belt cutter (also known as ring knife cutting machine), punching and cutting machine, etc. The late 1960s appeared using computer-controlled automatic cutting machine (CAM). (7) Packaging. The cut pieces of clothing according to different specifications, color classification, divided into a number of packages. ⑧ number. Will be a (package) clothing of the combination of clothing pieces organized into the same sequence number. There are two kinds of packet number or piece number. Shirts, pajamas and other products through