Range of imperfection
Staple fiber yarns often have "imperfections" as frequent smaller yarn faults or irregularities. These can be divided into four groups: Thin places, Thick places, Neps, Small.
These types of faults are either in the nature of the raw material or originate in a suboptimal manufacturing process. Isolated faults of this type are not regarded as disturbing in the yarn but do however have a negative effect on cloth appearance when too many are present.
- Diameter-related IPI - picture box
- Length-related IPI - picture box