Is the broken claw mark on mercerized cloth related to acid?

The crease of mercerized cloth is closely related to acid.

Acid has a great influence on cotton yarn. Acid will destroy the strength of cotton yarn until it dissolves. Caustic soda will not damage the strength of cotton yarn, but it can increase its luster, capillary effect and stable size.

Mercerized cotton is a process of mercerizing cotton cloth, which is to soak the cotton cloth in caustic soda with the concentration of 100g/L to 250g/L, then stretch the tension and reaction time with a cloth stretching rod, then unfold it with a cloth clamp, wash it with light alkali at 50℃, and then wash it with water at 80-90℃ to make the cotton brighter, better dyed and more stable in weft direction.