Garment Inspection | Trousers Inspection Standards and Requirements

Product Overview and Inspection Tool Preparation

As a core piece of formal business attire, the quality of trousers directly impacts the wearer's professional image. According to data from the China National Garment Association, the domestic mid- to high-end trousers market is expected to reach 28 billion yuan in 2023, with a qualified rate of over 98%. To ensure accurate inspection, the following professional tools are required:

1. Measuring tools :

   • Digital steel tape measure (accuracy 0.1mm)

   • Electronic digital caliper (for measuring seam width)

2. Standard comparison tools :

   • Standard light box (D65 light source, illumination ≥ 600lx)

   • Color difference comparison card (GB/T 250 gray sample card)

   • Defect Standard Sample Photos (GSB 16 Series)

3. Auxiliary equipment :

   • Fabric strength tester (testing seam strength)

   • Fabric inspection table (45° tilted design)

Appearance quality inspection standards

Surface quality grading requirements

Critical Control Points :

• Waistband stitching: Men's pants are limited to the back seam, women's pants can be stitched at the side seam

• Grid alignment: deviation of important parts ≤ 0.2cm (measured using a projector)

• Sewing line: No jumper or breakage during 3m/min constant speed test

Structural process inspection specifications

Dimensional tolerances of key parts

Special requirements :

• Crotch cross seam: Deviation ≤ 3mm (using transparent measurement template)

• Bag position symmetry: left and right deviation ≤ 2mm (coordinate measurement method)

• Door placket matching: length difference ≤ 3mm (overlap comparison)

Fabric performance testing

Warp and weft yarn direction control standards

Excipient requirements :

• Interlining peel strength ≥8N/2.5cm

• Zipper sliding force ≤ 3N (dynamometer test)

• Button tensile strength ≥50N (lasting 10 seconds)

Key points of sewing process testing

Quality requirements for key processes

1. Seam strength :

   • Side seam ≥120N (GB/T 13773 standard)

   • Crotch seam ≥150N (simulated wearing test)

2. Special parts treatment :

   • Bag reinforcement: backstitch length ≥ 1cm

   • Waistband sewing: thickness of three overlapping parts ≤ 3mm

   • Trouser leg treatment: uniform edge width (deviation ≤ 1mm)

3. Stitch quality :

   • One single stitch jump is allowed every 30cm

   • Wiring overlap ≥ 0.5cm (detected with a magnifying glass)

Defect grading criteria

Quality defect classification table

Typical cases :

• Serious: Crotch hole, main seam tear

• Heavy: obvious color difference, stripe misalignment > 0.5cm

• Minor: long threads, small stains (≤0.3cm²)

Ironing and packaging inspection

Finishing requirements

1. Ironing standard :

   • The crispness of the ironing line remains ≥48 hours

   • No aurora phenomenon (observed at a 45° angle)

2. Packaging specifications :

   • Moisture-proof paper pH value 7-8.5

   • Tag information completeness rate 100%

   • Barcode readability ≥99.9%

Suggestions for optimizing the inspection process

1. Sampling plan :

   • AQL 1.5 (major defects)

   • Batch ≤ 500: 32 pieces of sampling

2. Detection order :

   • Appearance first, function second

   • First plane then three-dimensional

3. Report Format :

   • Attached are close-up photos of key parts

   • Schematic diagram indicating measurement points

   • Provide defect distribution heat map

Through a systematic inspection process, we ensure that trousers meet the requirements of the national standard GB/T 2666-2017 "Trousers." Purchasers are advised to pay special attention to core indicators such as crotch reinforcement and stripe alignment accuracy. For high-end products, additional specialized tests should be conducted for fabric color fastness (≥ Grade 4) and dimensional stability (wash deformation rate ≤ 3%).

We provide professional third-party inspection and factory inspection services to ensure that the final tableware and kitchenware products delivered comply with standards, regulations and target market requirements, avoid disputes due to product quality issues, and improve supply chain management and quality control measures.