A satin wedding gown is usually made out a polyester blend. Satin is synthetic, unlike silk. However, satin feels and looks like silk and is usually less expensive, which is why it is a popular wedding gown material. Cleaning satin wedding gowns is easier than cleaning silk gowns because you can use water. Water will not damage satin the way it does silk; but you should not machine-wash satin wedding gowns, as the agitation may be too rough on the fabric.
Fill a tub with cold water and mix in one detergent cap-full of a gentle washing powder or white or clear dish soap. The water level should be high enough to cover your dress for soaking.
Place your wedding gown in the tub and let it soak for three minutes. Squeeze the suds gently through the dress.
Drain the tub and rinse the satin wedding dress with cold water. Gently squeeze the water from the dress and blot it with towels to remove as much moisture as possible.
Lay the dress flat on a drying rack, away from heat, moisture and light. Let it dry completely.
Turn the dress inside out and iron it on a low-heat setting. This will make the dress soft again. Hang up your dress and store it inside a plastic zippered bag for long-term maintenance.
Another option is to have your satin wedding dress dry-cleaned.
Do not wring the satin dress or use hot water. Do not put it in the dryer.