1. Inspection items
Appearance quality: Check whether the corduroy surface is even and straight, and whether there is any missing or bald phenomenon. The color should be pure, without obvious color difference, and the cloth surface should be flat, without wrinkles, holes and other defects. This directly affects the beauty of the product and is an intuitive basis for consumers to make purchases.

Fiber composition: Determine the type and proportion of fibers contained in the corduroy, such as cotton, polyester-cotton blended, etc. Accurate ingredient labeling protects consumers' right to know, and different fiber compositions determine fabric performance. For example, pure cotton corduroy has good moisture absorption, and polyester components can increase wear resistance.

Physical properties: Including strength tests, such as tensile strength and tearing strength, which reflect the durability of the fabric in use; there is also shrinkage test to ensure that the size is stable after washing and avoid deformation when wearing.

2. Inspection method
Appearance visual method: Under standard light source, the inspector uses experience and standard sample photos to observe the appearance problems of the cloth with the naked eye, and can use a magnifying glass to check the subtle details.

Fiber composition analysis method: chemical dissolution method is used to identify different fibers by their dissolution characteristics in specific chemical reagents; or the fiber morphology is observed under a microscope to determine the composition.

Physical performance test method: strength test uses a professional strength machine to apply tension to the sample until it breaks and record the data; shrinkage test simulates the washing and drying process, and measures the size change before and after calculation.

3. Testing standards
China follows GB/T 14311 "Corduroy" and other standards, which stipulate the allowable range of appearance defects and the qualified values ​​of various physical performance indicators. There are corresponding ISO standards internationally, and export products must meet the specific standards of the importing country. For example, the EU has restrictions on the residues of certain harmful substances, which prompts companies to produce according to high standards.

4. Significance of testing
For companies, strict testing can control product quality, reduce defective rates, enhance brand reputation, and enhance market competitiveness. For consumers, it means buying comfortable, durable, and safe corduroy products with good wearing experience and long service life. From the perspective of industry development, standardized testing promotes technological innovation, prompts companies to optimize processes, improves the quality level of the entire corduroy industry, and enables it to continue to prosper in the textile field.

In short, the testing of corduroy runs through all aspects of production and consumption, and is the key to ensuring quality and promoting industry progress.