There are several methods of yarn dyeing. Today, I will introduce you two.
One: yarn dyed
Transforming the staple yarn or filament into hank on the spinning machine, and then dyed in various forms of dyeing machine.
Two: cheese dyeing
Winding the staple yarn or filament in a hole, and then set the yarn dyeing in airborne (also known as flat plate, lifting plate, yarn frame etc.) with column (also known as bamboo yarn, spindle pole, rod etc.); put it into the dyeing machine, the dye penetrate between yarn or fiber by pump.
And I will introduce others next time.