What is a hole?#
A hole is an opening in the fabric where yarns are broken, cut or missing. In knitted fabrics, a broken loop can also start a run (ladder) that grows in wear. Holes are among the most serious fabric and garment defects, because they are visible, get worse in use and make the garment unsaleable.
Holes can come from many stages: knitting, wet processing, cutting, sewing, handling and packing. Their position, shape and pattern usually point to the source.
What it looks like#
- Small pinholes or larger openings in the fabric.
- In knits, a hole with a ladder running along the wale.
- Holes in a line along a seam, a fold or a wale.
- Holes with clean cut edges or with frayed, broken ends.
Where it occurs#
- Knitted fabrics, especially fine single jersey and elastane blends.
- Along seams (needle damage).
- At fold lines, where fabric was stored or transported folded.
- Across a roll in a repeating pattern (machine faults).
- Random places (handling damage, weak yarn).
Likely causes#
Read the pattern:
| Pattern | Likely source |
|---|---|
| Holes repeating in the same wale along the roll | Knitting needle or sinker fault |
| Holes along stitch lines | Sewing needle damage. See needle cut |
| Holes at fold lines or edges | Handling, storage or chemical damage concentrated at folds |
| Holes with clean cut edges | Scissors, cutters, blades |
| Holes after washing only | Weak or damaged yarn, needle damage that opened up |
| Random holes with frayed ends | Yarn faults, broken yarns, tendered fabric |
Machine-related causes#
- Knitting needles with broken latches or hooks, and damaged sinkers.
- High yarn tension causing yarn breaks at feeders.
- Sewing needles too thick or damaged.
- Sharp edges on machines, rollers or guides.
Material-related causes#
- Yarn faults: weak places, thin places, poorly tied knots.
- Chemical damage: harsh bleaching, catalyst residues or acid damage weakening fibers.
- Low fabric strength, which makes holes more likely under stress. See bursting strength.
Operator and process-related causes#
- Tools: scissors, thread cutters and hooks used carelessly.
- Handling: dragging fabric over rough surfaces, catching on trolleys.
- Tagging guns used in the wrong place.
Method-related causes#
- No fabric inspection before cutting, so holes are cut into panels.
- Poor packing and handling standards.
- Wrong needle type for knits in sewing.
How to confirm the cause#
- Map the holes: note their position on the roll or garment and look for a pattern.
- Examine the edges under magnification: clean cut, broken with frayed ends, or weakened fibers.
- Unravel around the hole in knits to see whether a loop was dropped or a yarn broke.
- Check fabric strength in the area and away from it if chemical damage is suspected.
- Trace back through processes: check greige fabric, dyed fabric, cut panels and sewn garments to find where holes first appear.
Immediate containment#
- Inspect rolls and garments from the same lot and process.
- Separate garments with holes; they usually cannot be repaired acceptably.
- Stop the machine or process where holes originate.
- Replace defective panels at cutting when holes are found before sewing.
Corrective action#
| Cause | Corrective action |
|---|---|
| Knitting needle or sinker | Replace damaged parts; check the rest of the needle bed |
| Yarn faults | Remove faulty yarn; raise with spinner |
| Chemical damage | Review bleaching and finishing; reprocess or reject lot |
| Sewing needle | Correct needle size and point; replace damaged needles |
| Handling | Remove sharp edges; train staff; control tools |
Preventive action#
- Fabric inspection of rolls before cutting, with holes marked. See 4-point inspection.
- Needle bed checks on knitting machines at set intervals.
- Controlled chemical processes in wet processing.
- Handling standards: smooth surfaces, covered trolleys, controlled tools.
- Sewability tests for new fabrics.
Inspection notes#
- Holes are generally classed as major or critical in buyer manuals, depending on size and location.
- Inspect garments over a light table or against light to find small holes.
- Record the location of holes on the garment to help trace the cause.
Example investigation#
A factory finds small holes near the side seams of T-shirts after finishing. The holes are not along the stitch line but about 2 cm from it, and they appear at the same height on many garments. Checking cut panels shows the same holes. The fabric rolls, inspected again, have a line of holes running along one wale. A damaged needle on the knitting machine is the source; the holes fall near the side seam because of where that wale lands in the marker.
Factory checklist#
- Fabric rolls inspected and holes marked before cutting
- Knitting needles and sinkers checked regularly
- Sewing needles correct for knits and changed on schedule
- Bleaching and finishing parameters controlled
- Handling surfaces free of sharp edges
- Hole positions recorded at inspection
Related guides: needle cut, barre.