B- Combed yarns:

In staple fiber processing, combing is an optional process that can be used when high quality combed yarn production is required.

Combing operation results in an improvement in yarn quality and enables spinner to spin finer count yarns than would be possible with carded yarn.
Objectives of combing process are:

• To remove predetermined amount of short fiber.
• To remove neps and impurities.
• To improve degree of parallelization of the fiber inside the yarn.

Accordingly, produced combed yarns are more uniform, stronger, more lustrous, compact, less hairy and cleaner than carded yarn.
Additionally, combed yarn is made only of long fibers to give more:
Expensive high quality yarn since in combing operation as much as 25% of fiber (almost ¼ of raw cotton) may be eliminated in form of short fibers waste called noils.
Since combed yarns have superior quality, they are used to produce stronger, smoother and more Serviceable cotton products which may carry special labels indicating they are made of combed Cotton yarns.

C- Carded yarns:

In the processing sequence of carded yarn, combing operation is cancelled and cotton passes directly from Carding to drawing and ring spinning.
Therefore carded yarn is cheaper in production but of inferior quality compared with combed yarn.
Carded yarns contain higher percent of short fibers and their staple fibers are less parallel so yarn is weaker and more hairy which do not enable spinner to produce fine count yarns.
Accordingly, carded yarns are used for producing inexpensive cotton fabric.

Generally, fabrics made of carded cotton yarns are cheaper and have less life span.