PIECE BY PIECE QUALITY INSPECTION
PQC doing following test physically during Inspection for leather bags
1. Function test
The objective is to check if the product really works. In the case of the leather bag an inspector will wear it and use the zippers.
2. Color fastness check on leather
Excessive dye may be rubbed off during a color fastness check. On leather this is a frequent problem. The test should be repeated 10 times with a dry cloth and 10 times with a wet cloth.
3. Abuse & Fatigue tests
Pulling on straps and zippers with stronger-than-usual force helps to understand the manufacturing quality of leather bags.
4. Seam strength test for leather bags
This test is similar to the abuse test but focuses on the seams. It uses “normal” force or a tension gauge to check seam strength.
5. Load test
The inspector loads the leather bag with weights (depending on the model between 2 and 20 kg for backpacks). He then lifts the bag 20 times and hangs it on a hook for 4 hours.
6. Zipper twisting test
This check tests both the strength of the zipper and the seams holding it. In the open, middle and closed position. The QC pulls the zipper sideways for 10 seconds each direction. Low quality zippers tend to open and bend beyond repair.
7. Smell Test
While it may sound funny at first, the smell test is an important part of every inspection: it is the easiest (but least reliable) way to discover illegal toxins. However the most reliable way to check it is to perform chemical tests in a laboratory.
Remark: The tests above check the real-life usability of leather bags. The process is similar for leather jackets, pants and in some cases even shoes. In addition, it is a must to laboratory tests to check if the leather product complies with national regulations.