List the different sizing faults &state the causes of these faults:
1. Size spot: Size mtl should be added gradually to the mixing tank for good mixing.If itis added at once, spot are appeared on the yarn.
2. Repeating warp streaks: This defect is due touneven tension in the pre-beam.
3. Shinnery: This defect due to the friction between the yarn & drying cylinder.
4. Sandy warp: Due to not crushed or grind the size mtl properly.
5. Ridge Beam: This fault occurs due to uneven distribution of yarn in wraith.
6. Hard sizing: If the size mtls are applied too much, the size becomes hard which causes hard sizing.
7. Improper drying:
Under drying > Bacteria form > yarn breakage.Over drying > Hard sizing.
8. Sizing dropping: This defect due to not optimum the viscosity of the size solution.
9. Size stitching: Due toimproper drying after sizing.
10. Uneven sizing:
Due to over or under sizing.
Due to over or under concentration of size liqour.
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