Needle Detection and Metal Contamination Control
A single broken needle fragment in a garment is a safety incident, and detection systems only work when they are part of a policy.
The practical guidance below is written for buyers and product developers who need a specification that a mill can meet.
Detection equipment
Conveyorised metal detectors and needle detectors screen garments before packing, with calibrated test pieces.
In practice the goal is predictability: the same result on the first order and on the fifth reorder.
Broken needle procedure
Machine operators must report fragments, and the full needle must be accounted for before production continues.
Fix the limits for the whole size range, not only for the middle size, as grading changes the numbers involved.
- Record settings and raw material lots for every approved production run
- Check in-process rather than relying on final inspection
- Escalate deviations the same day they appear
Calibration and verification
Detectors are checked at defined intervals with ferrous and non-ferrous test pieces and records kept.
Where several lines produce the same style, align settings across lines before the order starts.
Common failure points
Foil packaging, metal trims and rushing at peak throughput all cause missed detection.
Track results over several seasons, because a slow drift is easier to correct than a sudden failure.
- Ask for a separate price line for the requirement
- Confirm minimum quantities before committing the colourway
- Build one extra approval round into the calendar
Child safety relevance
For childrenswear, detection is a standard requirement rather than an optional control.
Ask for the cost of the requirement to be shown separately, so it can be weighed against the benefit it delivers.
Summary
Handled early, the requirement costs little and protects the launch date; handled late, it becomes an argument about responsibility.
