Polyester technical fabric guide for B2B manufacturers and buyers.
In plated circular knitting, two yarns are presented to the same needle in controlled relative positions to create different fabric faces or functional layers. A plating fault occurs when intended yarn placement becomes inconsistent, causing visible colour or texture spots on the wrong side.
How the defect or property develops
Plating depends on feeder positioning, yarn-path geometry, relative tension, needle trajectory and machine condition. A shift in the yarn path can allow the nominal back yarn to appear on the front, disrupting two-tone designs or moisture-management layers. Faults may be intermittent and localised to particular feeders.
A stable bulk process needs the same fabric construction, sample condition and clearly stated acceptance criteria across trials. Retain a reference from a known acceptable production lot.
Technical parameters to monitor
1. Feeder eye position and vertical yarn paths
Feeder eye position and vertical yarn paths: check alignment. Document the apparatus or operator method, machine position where applicable and the individual readings. Make only an authorised controlled adjustment before testing the effect.
2. Relative tension of plating yarns
Relative tension of plating yarns: record both individually. Document the apparatus or operator method, machine position where applicable and the individual readings. Make only an authorised controlled adjustment before testing the effect.
3. Needle-hook and latch condition
Needle-hook and latch condition: inspect affected machine section. Document the apparatus or operator method, machine position where applicable and the individual readings. Make only an authorised controlled adjustment before testing the effect.
4. Loop structure on both faces
Loop structure on both faces: compare to reference. Document the apparatus or operator method, machine position where applicable and the individual readings. Make only an authorised controlled adjustment before testing the effect.
5. Yarn lot colour and finish
Yarn lot colour and finish: rule out dye or friction differences. Document the apparatus or operator method, machine position where applicable and the individual readings. Make only an authorised controlled adjustment before testing the effect.
Factory evaluation procedure
- Step 1. Mark the area and direction of the observed plating fault. Record the production lot, test conditions and any outliers so the result remains traceable.
- Step 2. Inspect the corresponding feeder and both yarn paths during safe stoppage. Record the production lot, test conditions and any outliers so the result remains traceable.
- Step 3. Check relative tensions and yarn placement against machine settings. Record the production lot, test conditions and any outliers so the result remains traceable.
- Step 4. Trial an approved positioning correction with the same yarn lots. Record the production lot, test conditions and any outliers so the result remains traceable.
- Step 5. Inspect both faces across multiple courses after the correction. Record the production lot, test conditions and any outliers so the result remains traceable.
Metric, formula or reporting distinction
Report plating faults per inspected metres or a defined course count, with feeder positions and visual evidence. Do not assume an isolated wrong-colour streak proves a yarn dyeing fault.
Factory example and common wrong diagnosis
A jersey may show bright dots of a normally concealed contrast yarn even when its yarn dye lots are correctly matched. The cause may be feeding geometry rather than shade.
Before approving a proposed fix, compare the same garment or fabric under realistic use conditions. Verify that the change has not sacrificed another requirement such as appearance, strength, elasticity or comfort.
Practical buyer recommendation
When buying two-layer plated jerseys, inspect both sides and require an approved placement standard, not only garment-face appearance under one light.
Checklist for supplier and quality teams
- Agree construction and end-use requirement.
- Record the reference sample and lot identity.
- Use comparable test conditions and measurement units.
- Check both appearance and functional performance.
- Confirm changes after the relevant wash, wear or ageing process.
- Retain the corrected trial and approve bulk only on evidence.
Frequently asked questions
Is plating the same as jacquard?
No; plating controls relative face/back yarn positions, while jacquard controls loop selection and patterning.
Can a yarn feed problem cause wrong-colour spots?
Yes; feeding position and tension can affect plating consistency.
Will a dye test detect plating fault?
Not reliably; inspect loop structure and yarn placement.
Further reading
Educational guidance. Test specifications and operating limits depend on the customer, applicable current standard and qualified factory procedures.
