Soak the blouse for about 30 minutes in a gallon of warm water with 1/2 cup of 3 percent hydrogen peroxide.
Rinse the blouse under warm running water. Squeeze it gently and hang it up to drip dry. Inspect the garment when it's dry to determine the white factor.
Wash the blouse in a water temp as hot as it can handle, along with the recommended amount of oxygen bleach.
What to Wear With Sailor Pants