Tulle netting has a variety of applications, from stage and Halloween costumes to bridal veils. This lightweight synthetic netting, usually made of nylon and rayon, sometimes contains small amounts of natural fibers such as cotton and silk. Because of the varied fiber content and tendency to unravel, it's safer to hand wash tulle fabric than to toss it in the machine. Fortunately, unless they get very dirty, you won't need to wash your tulle items often.
Remove stains and spills from tulle immediately with warm water and mild laundry detergent. Wet the soiled area under the faucet, squeeze a drop of detergent onto the stain and rub the tulle gently between the palms of your hands to make suds. Rinse the suds out thoroughly.
Launder tutus or other large pieces of tulle in a clean bathtub. Fill the tub with enough cool water to cover the tulle, and add enough mild laundry detergent to make light suds. Swish the tulle through the sudsy water, and allow it to soak for half an hour.
Drain the sudsy water, refill the bathtub with plain water and swish the tulle through it to remove the suds.
Hang the tulle on a clothesline or over a drying rack in the bathtub, and allow it to drip-dry.
Hang dry tulle to store it, or -- for extended storage -- lay it flat in an airtight storage bin and keep it in a cool, dry environment.