Sewing defects in garments and bags
During the quality control of garments and bags, sewing defects are identified most often. There are different types that will be described in this article. In addition we will try to understand their effect on the manufactured product quality and resistance.
Sewing defects types
The first and most common one is the open seam. It is generally caused by abrasion. This often happens when a second thread crosses an older one: the passing needle cuts the older thread. This defect tends to weaken the garment.
The seam can “wave” when wearing the garment or the bag. Waving usually occurs when insufficient tension is applied on the thread during the sewing. Another similar defect is waiving of the fabric around a seam. This happens when too much tension was applied during the sewing. In both cases those defects are unaesthetic however without affecting the product quality and resistance.
Too many manufacturers use insufficient thread strengths: threads rip when under tension. This type of defect is common for bags and other garments. The only remedy is to use thicker and stronger threads.
Finally, it happens that the sewing technique used by the supplier to sew the product is inappropriate. In the best of the cases the seam is solid enough and the defect has only visual consequences on the product. Otherwise the product will break more easily. For example: a tight stitching is more resistant than a loose stitching.
Feel free to read also this specific article about jeans.
And you: which types of sewing defects did you ever find on your finished goods?