Jacquard knitting is a technique that allows for the creation of complex patterns and designs in knitwear. It uses a specialized machine, called a jacquard knitting machine, which can produce intricate designs using different colored yarns.

The basic process of jacquard knitting involves the use of a series of punched cards or electronic patterning devices, which control the movement of the needles on the machine. Each card or electronic pattern corresponds to a specific design or pattern. The cards or electronic patterning device are fed into the machine, and the needles are then raised and lowered according to the design on the card, creating the desired pattern in the fabric.

For creating a custom design, the designer will have to create a chart with the design, it is called a jacquard chart, the chart is then transformed into a punch card or electronic device, which the machine reads. The punch card or electronic device is fed into the machine, and the needles are raised and lowered according to the design on the card, resulting in a custom designed knitwear.

Jacquard knitting allows for a high degree of control and precision when creating patterns, which makes it well-suited for creating intricate designs such as logos, images, or even photographs on knitwear.