Desizing is a process by which size materials are removed from raw fabric. Without this process, many problems are created in the downstream process. To illustrate, chemicals are wasted in washing, and you don't get the desired effect. The objective of the desizing process is (1) to detach the starch material from cotton fabric. 2. Desizing process increases the absorbency power in the washing bath which helps to increase the affinity of fabric to chemicals. As result, desire effect is got. 3.Overall, make the fabric suitable for the subsequence process. (thanks for your comments. Please share my video)