Starch is used in laundry to stiffen

Starch is used in laundry to stiffen cotton and linen materials. When starch is applied to these fabrics and then ironed, it creates a crisp and polished look that is desired for some clothing items such as dress shirts, tablecloths, and napkins. Starch works by coating the fibers of the fabric, which creates a smooth surface that is more resistant to wrinkles and creases. Additionally, starch can help to protect the fabric from dirt and stains, as well as make it easier to iron. While starch can be used on other fabrics, such as wool and silk, it is more commonly used on cotton and linen due to their absorbent properties and ability to hold starch well.