Interlock Knit
A double-knit fabric that looks the same on both sides, smoother and more stable than single jersey.
Also known as: Double jersey, Interlock jersey
intermediate
Interlock is a variant of rib knit made on two needle beds so the two fabric layers interlock, producing a fabric identical on both faces, thicker and more stable, that does not curl.
What it is
Interlock is a double-knit structure — effectively two 1x1 rib fabrics knitted so their wales interlock — made on two needle beds. The result is a fabric that is identical and smooth on both faces, thicker and heavier than single jersey (commonly 180–250 GSM), more dimensionally stable, and importantly it does not curl at the edges and does not ladder as readily. It has less lengthwise stretch than single jersey but a soft, substantial hand.
These qualities make interlock a favourite for fitted T-shirts, dresses, activewear, children's clothing and reversible garments, where a clean face on both sides and a stable edge simplify sewing. Because it is denser, it uses more yarn than single jersey, so it costs more per garment. It is usually cotton or cotton-elastane, and its smooth surface takes prints well.
How to apply it
Choose interlock over single jersey when you want a thicker, non-curling, double-faced knit for fitted garments, dresses or activewear that needs a clean reverse.
Related entries
Sources & further reading
- Knitting Technology — David J. Spencer (book)