Sizing or size is any one of numerous substances is i.e. applied to textiles. To act as a protective filler or glaze. It is essential to warp yarn where the strength of warp is low or hairness of yarn is high The sizing reduces the breakage of yam and thus production stops on weaving machine reduces. The amount of size material added on the yarn surface is called size take-up percentage


(a) To improve strength
(b) To increase smoothness
(c) To increase elasticity and stiffness.
(d) Reduce extension percentage
(c) Impart adhesion

2. Lubricant or softener:
(a) To make the yarn soft and slippery
(b) To smoothen the yarn
(c) To reduce stiffness
(d) Reduce flexibility and friction

3. Antiseptic or anti-mildew agent;
(a) To prevent mildew formation
(b) To preserve size material for a long time
(c) To help to store the sized yarn


(d) To protect yarn from bacteria or fungus.


Due to sizing there is a change in different properties of yarn as
1. Elasticity of yarn : Higher
2. Yarn Strength Higher
3. Frictional Resistance Increase
4. Hairiness Lower
5. Flexibility: Lower
6. Smoothness Higher
7. Absorbency Lower
8. Weakness Lower
9. Yarn diameter Higher
10. Wt. of the yarn Higher
11. Static Electricity Lower
12. Count of yarn: Coarse

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