Popcorn Knit Dyeing and Finishing Flowchart

Popcorn knit is covered in small raised bobbles, and the whole job in dyeing and finishing is to keep them raised. Here is the cotton route from greige fabric to the cutting table.

At a glance

100% cottonFibre in our records

Not heat setIn our records

TextureMust stay raised

Popcorn is a textured knit with small, raised bobbles built from held or tucked loops. The bobbles are the design, so tension, overfeed and compacting must not flatten them. It is used for ladies’ tops, baby wear and casual knitwear.

This is a rare fabric in our records, so this article gives the route and the rules rather than statistics.

How it is dyed

Cotton popcorn follows the 100% cotton route. In our records it is not heat set; heat setting is only needed when it is heavy, tightly knitted or has elastane.

The main priority is keeping the bobbles raised and uniform. Avoid excessive tension, harsh compaction and aggressive finishing, and set the stenter width carefully.

Enzyme can be used only mildly and after a trial; an aggressive enzyme can flatten or weaken the bobbles.

The sequence before the dyeing machine

Every chart below follows the same sequence before dyeing. Steps a fabric does not need simply drop out; they are drawn dashed.

Greige inspection, then batching. A fabric that stays a tube is turned inside out here.
If it needs heat setting, singeing or mercerising: slitting first. None of these is ever done on a tube.
If it needs heat setting: heat setting in open width.
If it needs singeing: singeing in open width, after checking the flame cannot damage the fabric.
If it is mercerised: mercerising, then drying.
If the fabric was opened: back sewing, to make it a tube again with the face side inside (the loop side, for terry).
Loading into the dyeing machine, then scouring, bleaching and dyeing, single part or double part as the fibre needs.

Flowchart

100% cotton popcorn knit

Full fibre process: 100% cotton dyeing process.

Dyeing and finishing: 100% cotton popcorn knit

Start: greige popcorn knitfrom knitting

Greige inspectionholes, yarn faults, GSM

Batchingone lot per batch; turned inside out if it stays a tube

Slittingopen width: never heat set, singed or mercerised as a tube

Heat settingopen, 180–190°C; if heavy, tight or elastane

Singeingopen width; when no enzyme can be used and a clean face is needed; never on polyester faces

Back sewinginto a tube, face side inside

Load in dyeing machine

Scour-bleach98°C × 60 min; heavy: 70–80°C

Enzymemild, only after a trial

Reactive dyeing60°C

Wash-off & soaping

Fixing & softener

Slittingopen width

Stenterabout 150°C; width, GSM

Compactingshrinkage

Final inspectionGSM, shrinkage, shade

End: finished rollto cutting

GreigePreparationDyeingAfter-treatmentFinishingOnly when needed

Flow chart: 100% cotton popcorn knit, from greige fabric to the cutting table. Dashed steps run only when needed.

Common faults and buyer complaints

Flattened bobbles. Reduce tension and compaction.

Uneven bobble size. A knitting fault: control it at the knitting machine.

GSM and width variation. Control the stenter and compactor.

Crease marks. Improve relaxation and handling.

Pilling and hairiness. Optimise the finishing.

Kamrul Islam

Textile engineer with 14+ years in dyeing and fabric development. He writes every guide on Dyeing Solution from real production work. Full profile