Rayon is commonly used in blouses, formal dresses and slacks. But, like other fabrics made of synthetic fibres, rayon is known for shrinking if not laundered properly. Sometimes, even with proper washing methods or dry cleaning, items made of rayon still shrink. It's often possible, however, to salvage the garments.
Mix up a solution of one quart water and one tablespoon of baby shampoo.
Place your washable rayon fabric into the mixture.
Lay a piece of parchment paper on a flat surface. Place a similar-size garment onto the paper and trace an outline.
Remove the rayon item from the soapy mixture and gently squeeze out excess water.
Lay the rayon garment on top of the outline and carefully stretch it out to fit the outline.
Hold the edges of the rayon down with something heavy, such as coffee mugs, until the garment is dry.
If your rayon fabric comes back shrunken from the dry cleaner, ask the cleaner to stretch the item during the steaming process.