Classification of main defects in the process of garment inspection
As a third party inspector, you should have the professional knowledge of quality control and the production process, so that you can find all kinds of quality problems during the inspection process. Clothing products are relatively complex, because there are relatively many requirements for products, such as size, style, various labels, sewing techniques and fabrics, which all need to be confirmed and verified. Let's have a look at the specific requirements in the garment inspection process.
The product is neat, flat, folded properly, symmetrical, all parts are ironed flat, no leakage ironing, no dead pleating, the product is wireless head, no yarn wool, all parts meet the standard requirements. Thread and fabric should match, including color and lustre, texture, fastness, shrinkage rate and other aspects, both should be roughly the same, to ensure the inner quality of clothing and appearance quality shall prevail. The color of the button should match the color of the fabric.
2. Specifications and Dimensions
The sizes of products of different sizes must conform to the size table provided by the client. During the inspection, a certain number of samples should be randomly checked, and all the measured sizes should be recorded. Then, according to the size tolerance on the size table, qualified or failed can be judged.
3. color difference.
The color difference stipulation is to the raw material requirement, namely to the clothing fabric requirement. According to the provisions of the color difference of the relevant national standards, the upper collar of the garment, the fabric of the bag and the side seam of the trousers are the main parts, and the color difference is higher than the fourth level, and the other surface parts are the fourth level. For the color difference inspection of clothing products, the tool is "color fastness and fading sample card". The sample card is one of the national standards formulated by the former Ministry of Textile Industry. The sample card is composed of five pairs of gray standard samples, divided into five grades. Level 5 represents the best discoloration fastness, with color difference equal to zero, level 4 to 1 represents the relative increase in discoloration, and level 1 represents the most severe.
According to the standard, only one defect is allowed on each individual part. Independent part refers to the area divided by the piece of clothing. According to the main and secondary parts of the piece of clothing, it is divided into four areas: 1, 2, 3 and 4. Each part is an area on the piece of clothing. If the jacket has two front pieces, each chest is a part, each part is an independent part, two 1 parts are two independent parts. In this independent part of the chest, there are both pieces and patch pockets and pockets cover. According to the standard, only one part of each independent part is allowed to have defects, that is to say, there are defects on the piece of clothing, and there are no more defects on the patch bag and bag cover in this independent part. The type of defects varies with different fabrics, and the determination should be carried out according to the standard.
The stitching spacing of open thread (including dark thread without open thread) is specified in the stitching density, 14 ~ 18 stitches per 3cm.There are many varieties of fabrics, in order to ensure the appearance of the product and firm, different fabrics should choose different needle spacing. If the needle distance of hard fabric can be a little sparse generally, the needle distance of the fabric with loose quality of a material can be a little denser.