Intarsia is a knitting technique used to create patterns with multiple colours. As with the woodworking technique of the same name, fields of different colours and materials appear to be inlaid in one another, but are in fact all separate pieces, fit together like a jigsaw puzzle. Unlike other multicolour techniques there is only one “active” colour on any given stitch, and yarn is not carried across the back of the work. When a colour changes on a given row, the old yarn is left hanging. This means that any intarsia piece is actually several disjoint columns of colour. Intarsia is most often worked flat rather than in the round but it is possible to knit intarsia in circular knitting using particular techniques.
Here are some stitch patterns.