sewing thread defects?

Some common sewing thread defects include:

1. Knots or tangles in the thread
2. Uneven or inconsistent thread thickness
3. Weak or brittle thread that breaks easily
4. Excessive lint or fuzz on the thread
5. Color bleeding or fading
6. Poor winding or spooling of the thread
7. Misaligned or twisted threads
8. Poor quality or damaged thread materials
9. Uneven tension in the thread
10. Fraying or shredding of the thread fibers.